sh: Bump MAX_ACTIVE_REGIONS for SH7785.

When using URAM in NUMA mode another active region is needed.
Bump this up so we don't trigger the region truncation in
add_active_range().
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/mm/Kconfig

@@ -317,7 +317,8 @@ config ARCH_SPARSEMEM_DEFAULT
 config MAX_ACTIVE_REGIONS
 	int
 	default "6" if (CPU_SUBTYPE_SHX3 && SPARSEMEM)
-	default "2" if (CPU_SUBTYPE_SH7722 && SPARSEMEM)
+	default "2" if SPARSEMEM && (CPU_SUBTYPE_SH7722 || \
+		       CPU_SUBTYPE_SH7785)
 	default "1"
 
 config ARCH_POPULATES_NODE_MAP