sh: SE73180 updates for IRQ changes.

SE73180 can use the generic support, we just need to
wire up the IRQ demuxing.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index fb586b1..9064dfc 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -20,7 +20,6 @@
 config CPU_SH4A
 	bool
 	select CPU_SH4
-	select CPU_HAS_INTC2_IRQ
 
 config CPU_SUBTYPE_ST40
 	bool
@@ -144,6 +143,7 @@
 config CPU_SUBTYPE_SH7780
 	bool "Support SH7780 processor"
 	select CPU_SH4A
+	select CPU_HAS_INTC2_IRQ
 
 endmenu