sh: URAM node support for SH7722.

This adds the URAM block on SH7722 as a separate node.
Sparsemem is required for this, or it can simply be disabled
by explicitly selecting a flatmem model.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 8c5b73a..dd9b226 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -211,6 +211,7 @@
 	select CPU_SH4AL_DSP
 	select CPU_SHX2
 	select CPU_HAS_IPR_IRQ
+	select ARCH_SPARSEMEM_ENABLE
 
 endchoice
 
@@ -321,6 +322,7 @@
 
 config MAX_ACTIVE_REGIONS
 	int
+	default "2" if (CPU_SUBTYPE_SH7722 && SPARSEMEM)
 	default "1"
 
 config ARCH_POPULATES_NODE_MAP