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/cmd/Kconfig b/cmd/Kconfig
index 73fc29e..d9f7151 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -715,6 +715,13 @@
 	  with led on/off/togle/blink. Any LED drivers can be controlled with
 	  this command, e.g. led_gpio.
 
+config CMD_DATE
+	bool "date"
+	default y if DM_RTC
+	help
+	  Enable the 'date' command for getting/setting the time/date in RTC
+	  devices.
+
 config CMD_TIME
 	bool "time"
 	help