sh: Consolidate rsk7203/7201 in to a new mach-rsk.

RSK+ platforms have quite a few characteristics in common, so roll them
together in to a shiny new RSK mach-type.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index ad00961..d56889e 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -135,6 +135,7 @@
 machdir-$(CONFIG_SH_TITAN)			+= mach-titan
 machdir-$(CONFIG_SH_LBOX_RE2)			+= mach-lboxre2
 machdir-$(CONFIG_SH_CAYMAN)			+= mach-cayman
+machdir-$(CONFIG_SH_RSK)			+= mach-rsk
 
 ifneq ($(machdir-y),)
 core-y	+= $(addprefix arch/sh/boards/, \