i2c: Rename SPL/TPL_I2C_SUPPORT to I2C

Rename these options so that CONFIG_IS_ENABLED can be used with them.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/mach-omap2/am33xx/Kconfig b/arch/arm/mach-omap2/am33xx/Kconfig
index 70377f0..4268419 100644
--- a/arch/arm/mach-omap2/am33xx/Kconfig
+++ b/arch/arm/mach-omap2/am33xx/Kconfig
@@ -42,7 +42,7 @@
 	imply SPL_FS_EXT4
 	imply SPL_FS_FAT
 	imply SPL_GPIO
-	imply SPL_I2C_SUPPORT
+	imply SPL_I2C
 	imply SPL_LIBCOMMON_SUPPORT
 	imply SPL_LIBDISK_SUPPORT
 	imply SPL_LIBGENERIC_SUPPORT
@@ -226,7 +226,7 @@
 	imply SPL_FS_EXT4
 	imply SPL_FS_FAT
 	imply SPL_GPIO
-	imply SPL_I2C_SUPPORT
+	imply SPL_I2C
 	imply SPL_LIBCOMMON_SUPPORT
 	imply SPL_LIBDISK_SUPPORT
 	imply SPL_LIBGENERIC_SUPPORT