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/wtk_defconfig b/configs/wtk_defconfig
index d0c0136..ad9100e 100644
--- a/configs/wtk_defconfig
+++ b/configs/wtk_defconfig
@@ -11,6 +11,7 @@
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_SNTP=y
 CONFIG_CMD_BMP=y
+CONFIG_CMD_DATE=y
 CONFIG_CMD_EXT2=y
 CONFIG_MAC_PARTITION=y
 CONFIG_DOS_PARTITION=y