cmd: add Kconfig option for 'date' command

Signed-off-by: Chris Packham <judge.packham@gmail.com>
[trini: default y if DM_RTC, re-sync]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/apf27_defconfig b/configs/apf27_defconfig
index e22dc07..71839f5 100644
--- a/configs/apf27_defconfig
+++ b/configs/apf27_defconfig
@@ -20,6 +20,7 @@
 CONFIG_CMD_DNS=y
 CONFIG_CMD_BSP=y
 CONFIG_CMD_CACHE=y
+CONFIG_CMD_DATE=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_UBI=y