sh: INTC stubs for SH7343 and SH7770 builds.

Get the SH7343 and SH7770 stuff linking again. Both of these still
require proper INTC support.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cpu/sh4a/setup-sh7343.c

@@ -41,3 +41,7 @@ static int __init sh7343_devices_setup(void)
 				    ARRAY_SIZE(sh7343_devices));
 }
 __initcall(sh7343_devices_setup);
+
+void __init plat_irq_setup(void)
+{
+}

arch/sh/kernel/cpu/sh4a/setup-sh7770.c

@@ -51,3 +51,7 @@ static int __init sh7770_devices_setup(void)
 				    ARRAY_SIZE(sh7770_devices));
 }
 __initcall(sh7770_devices_setup);
+
+void __init plat_irq_setup(void)
+{
+}