i2c, mxc: rework i2c base address names for different SoCs

rework and unify i2c address names for different SoCs, which
use the mxc_i2c driver.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/include/asm/arch-mx25/imx-regs.h b/arch/arm/include/asm/arch-mx25/imx-regs.h
index 3dffa4a..78c4e9b 100644
--- a/arch/arm/include/asm/arch-mx25/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx25/imx-regs.h
@@ -293,13 +293,13 @@
 #define IMX_ETB_SLOT4_BASE	(0x43F0C000)
 #define IMX_ETB_SLOT5_BASE	(0x43F10000)
 #define IMX_ECT_CTIO_BASE	(0x43F18000)
-#define IMX_I2C_BASE		(0x43F80000)
-#define IMX_I2C3_BASE		(0x43F84000)
+#define I2C1_BASE_ADDR		(0x43F80000)
+#define I2C3_BASE_ADDR		(0x43F84000)
 #define IMX_CAN1_BASE		(0x43F88000)
 #define IMX_CAN2_BASE		(0x43F8C000)
 #define UART1_BASE		(0x43F90000)
 #define UART2_BASE		(0x43F94000)
-#define IMX_I2C2_BASE		(0x43F98000)
+#define I2C2_BASE_ADDR		(0x43F98000)
 #define IMX_OWIRE_BASE		(0x43F9C000)
 #define IMX_CSPI1_BASE		(0x43FA4000)
 #define IMX_KPP_BASE		(0x43FA8000)