sh: replace sh specific CONFIG_VOYAGERGX with CONFIG_MFD_SM501

This patch replaces all instances of CONFIG_VOYAGERGX with
CONFIG_MFD_SM501. While at it we make sure the r2d code compiles
both with and without SM501.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 37cf636..6c73a5b 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -136,7 +136,7 @@
 
 # Companion chips
 core-$(CONFIG_HD6446X_SERIES)	+= arch/sh/cchips/hd6446x/
-core-$(CONFIG_VOYAGERGX)	+= arch/sh/cchips/voyagergx/
+core-$(CONFIG_MFD_SM501)	+= arch/sh/cchips/voyagergx/
 
 cpuincdir-$(CONFIG_CPU_SH2)	:= cpu-sh2
 cpuincdir-$(CONFIG_CPU_SH2A)	:= cpu-sh2a