sh: enable sparseirq for highlander and r2d.

highlander and r2d are the only remaining ones that were blocking
sparseirq being turned on by default, but it turns out that they already
work fine with it by virtue of register_intc_controller(). As such, we
can kill off the dependencies and turn it on by default.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -87,6 +87,10 @@ config GENERIC_IRQ_PROBE
 config IRQ_PER_CPU
 	def_bool y
 
+config SPARSE_IRQ
+	def_bool y
+	depends on SUPERH32
+
 config GENERIC_GPIO
 	def_bool n
 
@@ -728,18 +732,6 @@ config GUSA_RB
 	  LLSC, this should be more efficient than the other alternative of
 	  disabling interrupts around the atomic sequence.
 
-config SPARSE_IRQ
-	def_bool y
-	depends on SUPERH32 && !SH_HIGHLANDER && !SH_RTS7751R2D
-	help
-	  This enables support for sparse irqs. This is useful in general
-	  as most CPUs have a fairly sparse array of IRQ vectors, which
-	  the irq_desc then maps directly on to. Systems with a high
-	  number of off-chip IRQs will want to treat this as
-	  experimental until they have been independently verified.
-
-	  If you don't know what to do here, say N.
-
 endmenu
 
 menu "Boot options"