ptp: ocp: Simplify Kconfig.

Remove the 'imply' statements, these apparently are not doing
what I expected.  Platform modules which are used by the driver
still need to be enabled in the overall config for them to be
used, but there isn't a hard dependency on them.

Use 'depend' for selectable modules which provide functions
used directly by the driver.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/ptp/Kconfig

@@ -171,16 +171,10 @@ config PTP_1588_CLOCK_OCP
 	tristate "OpenCompute TimeCard as PTP clock"
 	depends on PTP_1588_CLOCK
 	depends on HAS_IOMEM && PCI
-	depends on SPI && I2C && MTD
+	depends on I2C && MTD
+	depends on SERIAL_8250
 	depends on !S390
-	imply SPI_MEM
-	imply SPI_XILINX
-	imply MTD_SPI_NOR
-	imply I2C_XILINX
-	select SERIAL_8250
 	select NET_DEVLINK
-
-	default n
 	help
 	  This driver adds support for an OpenCompute time card.