sh: intc: Split up the INTC code.

This splits up the sh intc core in to something more vaguely resembling
a subsystem. Most of the functionality was alread fairly well
compartmentalized, and there were only a handful of interdependencies
that needed to be resolved in the process.

This also serves as future-proofing for the genirq and sparseirq rework,
which will make some of the split out functionality wholly generic,
allowing things to be killed off in place with minimal migration pain.

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

drivers/sh/Kconfig

@@ -1,33 +1,5 @@
-config INTC_USERIMASK
-	bool "Userspace interrupt masking support"
-	depends on ARCH_SHMOBILE || (SUPERH && CPU_SH4A)
-	help
-	  This enables support for hardware-assisted userspace hardirq
-	  masking.
+menu "SuperH / SH-Mobile Driver Options"
 
-	  SH-4A and newer interrupt blocks all support a special shadowed
-	  page with all non-masking registers obscured when mapped in to
-	  userspace. This is primarily for use by userspace device
-	  drivers that are using special priority levels.
+source "drivers/sh/intc/Kconfig"
 
-	  If in doubt, say N.
-
-config INTC_BALANCING
-	bool "Hardware IRQ balancing support"
-	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
-	  taken care of automatically by hardware for distributed
-	  vectors.
-
-	  If in doubt, say N.
-
-config INTC_MAPPING_DEBUG
-	bool "Expose IRQ to per-controller id mapping via debugfs"
-	depends on DEBUG_FS
-	help
-	  This will create a debugfs entry for showing the relationship
-	  between system IRQs and the per-controller id tables.
-
-	  If in doubt, say N.
+endmenu