Rename SPL_POWER_SUPPORT to SPL_POWER

Rename this option so that CONFIG_IS_ENABLED can be used with it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/configs/rock-pi-e-rk3328_defconfig b/configs/rock-pi-e-rk3328_defconfig
index ce932ac..5231f32 100644
--- a/configs/rock-pi-e-rk3328_defconfig
+++ b/configs/rock-pi-e-rk3328_defconfig
@@ -29,7 +29,7 @@
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x10000
 CONFIG_SPL_I2C_SUPPORT=y
-CONFIG_SPL_POWER_SUPPORT=y
+CONFIG_SPL_POWER=y
 CONFIG_SPL_ATF=y
 CONFIG_SPL_ATF_NO_PLATFORM_PARAM=y
 CONFIG_TPL_DRIVERS_MISC_SUPPORT=y