rtc: imx-sc: depend on HAVE_ARM_SMCCC

Fix the following build issue:

drivers/rtc/rtc-imx-sc.o: In function `imx_sc_rtc_set_time':
>> rtc-imx-sc.c:(.text+0x212): undefined reference to `__arm_smccc_smc'

Fixes: 13a929f3 ("rtc: imx-sc: add rtc set time support")
Reviewed-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/Kconfig

@@ -1698,6 +1698,7 @@ config RTC_DRV_SNVS
 
 config RTC_DRV_IMX_SC
 	depends on IMX_SCU
+	depends on HAVE_ARM_SMCCC
 	tristate "NXP i.MX System Controller RTC support"
 	help
 	   If you say yes here you get support for the NXP i.MX System