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/configs/odroid-go2_defconfig b/configs/odroid-go2_defconfig
index e556c73..aafec84 100644
--- a/configs/odroid-go2_defconfig
+++ b/configs/odroid-go2_defconfig
@@ -34,7 +34,7 @@
 CONFIG_SPL_STACK_R=y
 # CONFIG_TPL_BANNER_PRINT is not set
 CONFIG_SPL_CRC32=y
-CONFIG_SPL_I2C_SUPPORT=y
+CONFIG_SPL_I2C=y
 CONFIG_SPL_POWER=y
 CONFIG_SPL_ATF=y
 # CONFIG_TPL_FRAMEWORK is not set