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/orangepi_2_defconfig b/configs/orangepi_2_defconfig
index 6f8ceb0..efb7e8c 100644
--- a/configs/orangepi_2_defconfig
+++ b/configs/orangepi_2_defconfig
@@ -7,7 +7,7 @@
 CONFIG_DRAM_CLK=672
 CONFIG_USB1_VBUS_PIN="PG13"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
-CONFIG_SPL_I2C_SUPPORT=y
+CONFIG_SPL_I2C=y
 CONFIG_SUN8I_EMAC=y
 CONFIG_SY8106A_POWER=y
 CONFIG_USB_EHCI_HCD=y