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/TQM855M_defconfig b/configs/TQM855M_defconfig
index 29e27e9..ea0ad4d 100644
--- a/configs/TQM855M_defconfig
+++ b/configs/TQM855M_defconfig
@@ -8,6 +8,7 @@
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_SNTP=y
+CONFIG_CMD_DATE=y
 CONFIG_CMD_EXT2=y
 CONFIG_MAC_PARTITION=y
 CONFIG_DOS_PARTITION=y