[ARM] Orion: enable RTC_DRV_PCF8563 in the defconfig for HP mv2120

Enable RTC_DRV_PCF8563 in the Orion defconfig since this driver is
needed by the HP mv2120.
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>

arch/arm/configs/orion5x_defconfig

@@ -1118,7 +1118,7 @@ CONFIG_RTC_DRV_DS1307=y
 CONFIG_RTC_DRV_RS5C372=y
 # CONFIG_RTC_DRV_ISL1208 is not set
 # CONFIG_RTC_DRV_X1205 is not set
-# CONFIG_RTC_DRV_PCF8563 is not set
+CONFIG_RTC_DRV_PCF8563=y
 # CONFIG_RTC_DRV_PCF8583 is not set
 CONFIG_RTC_DRV_M41T80=y
 # CONFIG_RTC_DRV_M41T80_WDT is not set