MX5: Add initial support for MX53 processor

Add initial support for Freescale MX53 processor,

- Add the iomux support and the pin definition,
- Add the regs definition, clean up some unused def from mx51,
- Add the low level init support, make use the freq input of setup_pll macro

Signed-off-by: Jason Liu  <r64343@freescale.com>
diff --git a/arch/arm/include/asm/arch-mx5/asm-offsets.h b/arch/arm/include/asm/arch-mx5/asm-offsets.h
index afd2728..793f69c 100644
--- a/arch/arm/include/asm/arch-mx5/asm-offsets.h
+++ b/arch/arm/include/asm/arch-mx5/asm-offsets.h
@@ -37,7 +37,12 @@
 #define CLKCTL_CCGR4            0x78
 #define CLKCTL_CCGR5            0x7C
 #define CLKCTL_CCGR6            0x80
+#if defined(CONFIG_MX53)
+#define CLKCTL_CCGR7            0x84
+#define CLKCTL_CMEOR            0x88
+#elif defined(CONFIG_MX51)
 #define CLKCTL_CMEOR            0x84
+#endif
 
 /* DPLL */
 #define PLL_DP_CTL	0x00