xilinx: zynqmp: Enable CMD_RTC command with Zynqmp RTC driver

Enable RTC command to be able to check available.
And also enable ZynqMP RTC driver to be possible to use by default.

Here is the list when both drivers are enabled:
ZynqMP> rtc list
RTC #0 - rtc_emul
RTC #1 - rtc@ffa60000

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_zynqmp_virt_defconfig b/configs/xilinx_zynqmp_virt_defconfig
index 40a87ca..43ab4e7 100644
--- a/configs/xilinx_zynqmp_virt_defconfig
+++ b/configs/xilinx_zynqmp_virt_defconfig
@@ -60,6 +60,7 @@
 CONFIG_CMD_BMP=y
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_EFIDEBUG=y
+CONFIG_CMD_RTC=y
 CONFIG_CMD_TIME=y
 CONFIG_CMD_GETTIME=y
 CONFIG_CMD_TIMER=y
@@ -151,6 +152,7 @@
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_RTC=y
 CONFIG_RTC_EMULATION=y
+CONFIG_RTC_ZYNQMP=y
 CONFIG_SCSI=y
 CONFIG_DM_SCSI=y
 CONFIG_ARM_DCC=y