Kconfig: Rename SPL_CRC32_SUPPORT to SPL_CRC32

Drop the _SUPPORT suffix so we can use CONFIG_IS_ENABLED() with this
option.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
diff --git a/configs/firefly-px30_defconfig b/configs/firefly-px30_defconfig
index d902ab7..1f24f92 100644
--- a/configs/firefly-px30_defconfig
+++ b/configs/firefly-px30_defconfig
@@ -30,7 +30,7 @@
 # CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
 CONFIG_SPL_STACK_R=y
 # CONFIG_TPL_BANNER_PRINT is not set
-CONFIG_SPL_CRC32_SUPPORT=y
+CONFIG_SPL_CRC32=y
 CONFIG_SPL_ATF=y
 # CONFIG_TPL_FRAMEWORK is not set
 # CONFIG_CMD_BOOTD is not set