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/Yones_Toptech_BD1078_defconfig b/configs/Yones_Toptech_BD1078_defconfig
index 84302ff..4f89d71 100644
--- a/configs/Yones_Toptech_BD1078_defconfig
+++ b/configs/Yones_Toptech_BD1078_defconfig
@@ -19,5 +19,5 @@
 # CONFIG_VIDEO_LCD_BL_PWM_ACTIVE_LOW is not set
 CONFIG_VIDEO_LCD_PANEL_LVDS=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
-CONFIG_SPL_I2C_SUPPORT=y
+CONFIG_SPL_I2C=y
 CONFIG_USB_MUSB_HOST=y