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-imx/imx-regs.h b/arch/arm/include/asm/arch-imx/imx-regs.h
index 4de0779..93e3369 100644
--- a/arch/arm/include/asm/arch-imx/imx-regs.h
+++ b/arch/arm/include/asm/arch-imx/imx-regs.h
@@ -42,7 +42,7 @@
 #define IMX_MMC_BASE               (0x14000 + IMX_IO_BASE)
 #define IMX_ASP_BASE               (0x15000 + IMX_IO_BASE)
 #define IMX_BTA_BASE               (0x16000 + IMX_IO_BASE)
-#define IMX_I2C_BASE               (0x17000 + IMX_IO_BASE)
+#define I2C1_BASE_ADDR             (0x17000 + IMX_IO_BASE)
 #define IMX_SSI_BASE               (0x18000 + IMX_IO_BASE)
 #define IMX_SPI2_BASE              (0x19000 + IMX_IO_BASE)
 #define IMX_MSHC_BASE              (0x1A000 + IMX_IO_BASE)