MXC: rename mxc_map_io to architecture specific versions

This allows us to have more mapping functions for more than one
i.MX architecture in the kernel. As this is the earliest board
specific hook we have, also use it to set the cpu type.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx3/mm.c b/arch/arm/mach-mx3/mm.c
index 9e1459c..1f5fdd4 100644
--- a/arch/arm/mach-mx3/mm.c
+++ b/arch/arm/mach-mx3/mm.c
@@ -72,8 +72,17 @@
  * system startup to create static physical to virtual memory mappings
  * for the IO modules.
  */
-void __init mxc_map_io(void)
+void __init mx31_map_io(void)
 {
+	mxc_set_cpu_type(MXC_CPU_MX31);
+
+	iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
+}
+
+void __init mx35_map_io(void)
+{
+	mxc_set_cpu_type(MXC_CPU_MX35);
+
 	iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
 }