configs: remove obsolete CONFIG_SYS_MMC_BASE

All usages of this have been removed

Signed-off-by: Harm Berntsen <harm.berntsen@nedap.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
CC: Simon Glass <sjg@chromium.org>
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index b693925..6d77564 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -2906,7 +2906,6 @@
 CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR
 CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS
 CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
-CONFIG_SYS_MMC_BASE
 CONFIG_SYS_MMC_CD_PIN
 CONFIG_SYS_MMC_CLK_OD
 CONFIG_SYS_MMC_MAX_BLK_COUNT