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-mx2/generic.c b/arch/arm/mach-mx2/generic.c
index bd51dd0..169372f 100644
--- a/arch/arm/mach-mx2/generic.c
+++ b/arch/arm/mach-mx2/generic.c
@@ -69,7 +69,17 @@
  * system startup to create static physical to virtual
  * memory map for the IO modules.
  */
-void __init mxc_map_io(void)
+void __init mx21_map_io(void)
 {
+	mxc_set_cpu_type(MXC_CPU_MX21);
+
 	iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
 }
+
+void __init mx27_map_io(void)
+{
+	mxc_set_cpu_type(MXC_CPU_MX27);
+
+	iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
+}
+