Rename GPIO_SUPPORT to GPIO

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

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index 35d6e2c..d6d2b67 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -74,7 +74,7 @@
 
 config SPL_DM_I2C_GPIO
 	bool "Enable Driver Model for software emulated I2C bus driver in SPL"
-	depends on SPL_DM && DM_I2C_GPIO && SPL_DM_GPIO && SPL_GPIO_SUPPORT
+	depends on SPL_DM && DM_I2C_GPIO && SPL_DM_GPIO && SPL_GPIO
 	default y
 	help
 	  Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO