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/imx8mm-icore-mx8mm-edimm2.2_defconfig b/configs/imx8mm-icore-mx8mm-edimm2.2_defconfig
index 99c0179..e4ebf73 100644
--- a/configs/imx8mm-icore-mx8mm-edimm2.2_defconfig
+++ b/configs/imx8mm-icore-mx8mm-edimm2.2_defconfig
@@ -25,7 +25,7 @@
 CONFIG_DEFAULT_FDT_FILE="imx8mm-icore-mx8mm-edimm2.2.dtb"
 CONFIG_SPL_BOARD_INIT=y
 CONFIG_SPL_SEPARATE_BSS=y
-CONFIG_SPL_POWER_SUPPORT=y
+CONFIG_SPL_POWER=y
 CONFIG_SYS_PROMPT="u-boot=> "
 # CONFIG_CMD_EXPORTENV is not set
 # CONFIG_CMD_IMPORTENV is not set