ARM: omap1: add Kconfig dependencies for unused boards

Legacy board files with no known users are planned to get removed in
early 2023, and this covers the majority of the omap1 boards as well.

According to Tony, the actual users are all on OSK, Nokia770, and
AMS-Delta. Additionally, the sx1 and palmte boards are supported by qemu,
which is convenient for testing, so all five stay around past the initial
board removal.

As omap1 is now part of the multiplatform build and uses the common-clk
framework, it has become easier to convert these to use devicetree
based booting in the future.

Cc: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: linux-omap@vger.kernel.org
Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/omap1_defconfig

@@ -25,17 +25,8 @@ CONFIG_ARCH_OMAP850=y
 CONFIG_ARCH_OMAP16XX=y
 # CONFIG_OMAP_MUX is not set
 CONFIG_OMAP_RESET_CLOCKS=y
-CONFIG_MACH_OMAP_INNOVATOR=y
-CONFIG_MACH_OMAP_H2=y
-CONFIG_MACH_OMAP_H3=y
-CONFIG_MACH_HERALD=y
 CONFIG_MACH_OMAP_OSK=y
-CONFIG_MACH_OMAP_PERSEUS2=y
-CONFIG_MACH_OMAP_FSAMPLE=y
-CONFIG_MACH_VOICEBLUE=y
 CONFIG_MACH_OMAP_PALMTE=y
-CONFIG_MACH_OMAP_PALMZ71=y
-CONFIG_MACH_OMAP_PALMTT=y
 CONFIG_MACH_SX1=y
 CONFIG_MACH_NOKIA770=y
 CONFIG_MACH_AMS_DELTA=y

arch/arm/mach-omap1/Kconfig

@@ -132,6 +132,7 @@ comment "OMAP Board Type"
 config MACH_OMAP_INNOVATOR
 	bool "TI Innovator"
 	depends on ARCH_OMAP15XX || ARCH_OMAP16XX
+	depends on UNUSED_BOARD_FILES
 	help
           TI OMAP 1510 or 1610 Innovator board support. Say Y here if you
           have such a board.
@@ -139,6 +140,7 @@ config MACH_OMAP_INNOVATOR
 config MACH_OMAP_H2
 	bool "TI H2 Support"
 	depends on ARCH_OMAP16XX
+	depends on UNUSED_BOARD_FILES
 	help
 	  TI OMAP 1610/1611B H2 board support. Say Y here if you have such
 	  a board.
@@ -146,6 +148,7 @@ config MACH_OMAP_H2
 config MACH_OMAP_H3
 	bool "TI H3 Support"
 	depends on ARCH_OMAP16XX
+	depends on UNUSED_BOARD_FILES
 	help
 	  TI OMAP 1710 H3 board support. Say Y here if you have such
 	  a board.
@@ -153,6 +156,7 @@ config MACH_OMAP_H3
 config MACH_HERALD
 	bool "HTC Herald"
 	depends on ARCH_OMAP850
+	depends on UNUSED_BOARD_FILES
 	help
 	  HTC Herald smartphone support (AKA T-Mobile Wing, ...)
 
@@ -166,6 +170,7 @@ config MACH_OMAP_OSK
 config OMAP_OSK_MISTRAL
 	bool "Mistral QVGA board Support"
 	depends on MACH_OMAP_OSK
+	depends on UNUSED_BOARD_FILES
 	help
 	  The OSK supports an optional add-on board with a Quarter-VGA
 	  touchscreen, PDA-ish buttons, a resume button, bicolor LED,
@@ -174,6 +179,7 @@ config OMAP_OSK_MISTRAL
 config MACH_OMAP_PERSEUS2
 	bool "TI Perseus2"
 	depends on ARCH_OMAP730
+	depends on UNUSED_BOARD_FILES
 	help
 	  Support for TI OMAP 730 Perseus2 board. Say Y here if you have such
 	  a board.
@@ -181,6 +187,7 @@ config MACH_OMAP_PERSEUS2
 config MACH_OMAP_FSAMPLE
 	bool "TI F-Sample"
 	depends on ARCH_OMAP730
+	depends on UNUSED_BOARD_FILES
 	help
 	  Support for TI OMAP 850 F-Sample board. Say Y here if you have such
 	  a board.
@@ -197,6 +204,7 @@ config MACH_OMAP_PALMTE
 config MACH_OMAP_PALMZ71
 	bool "Palm Zire71"
 	depends on ARCH_OMAP15XX
+	depends on UNUSED_BOARD_FILES
 	help
 	 Support for the Palm Zire71 PDA. To boot the kernel,
 	 you'll need a PalmOS compatible bootloader; check out
@@ -206,6 +214,7 @@ config MACH_OMAP_PALMZ71
 config MACH_OMAP_PALMTT
 	bool "Palm Tungsten|T"
 	depends on ARCH_OMAP15XX
+	depends on UNUSED_BOARD_FILES
 	help
 	  Support for the Palm Tungsten|T PDA. To boot the kernel, you'll
 	  need a PalmOS compatible bootloader (Garux); check out
@@ -246,6 +255,7 @@ config MACH_AMS_DELTA
 config MACH_OMAP_GENERIC
 	bool "Generic OMAP board"
 	depends on ARCH_OMAP15XX || ARCH_OMAP16XX
+	depends on UNUSED_BOARD_FILES
 	help
           Support for generic OMAP-1510, 1610 or 1710 board with
           no FPGA. Can be used as template for porting Linux to