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/malta64_defconfig b/configs/malta64_defconfig
index 4479a8a..a7f14bd 100644
--- a/configs/malta64_defconfig
+++ b/configs/malta64_defconfig
@@ -13,6 +13,7 @@
 CONFIG_CMD_DHCP=y
 # CONFIG_CMD_NFS is not set
 CONFIG_CMD_PING=y
+CONFIG_CMD_DATE=y
 # CONFIG_ISO_PARTITION is not set
 CONFIG_OF_EMBED=y
 CONFIG_MTD_NOR_FLASH=y