sh: Support IRQ balancing for SH-X3 proto cores, too.

This adds in hardware IRQ auto-distribution support for SH-X3 proto CPUs,
following the SH7786 support.

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

drivers/sh/Kconfig

@@ -14,7 +14,7 @@ config INTC_USERIMASK
 
 config INTC_BALANCING
 	bool "Hardware IRQ balancing support"
-	depends on SMP && SUPERH && CPU_SUBTYPE_SH7786
+	depends on SMP && SUPERH && CPU_SHX3
 	help
 	  This enables support for IRQ auto-distribution mode on SH-X3
 	  SMP parts. All of the balancing and CPU wakeup decisions are