mfd: macsmc: Wire up Apple SMC RTC subdevice

Add the new SMC RTC function to the mfd device

Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: James Calligeros <jcalligeros99@gmail.com>

Author: chadmed

drivers/mfd/macsmc.c

@@ -47,6 +47,7 @@
 static const struct mfd_cell apple_smc_devs[] = {
 	MFD_CELL_OF("macsmc-gpio", NULL, NULL, 0, 0, "apple,smc-gpio"),
 	MFD_CELL_OF("macsmc-reboot", NULL, NULL, 0, 0, "apple,smc-reboot"),
+	MFD_CELL_OF("macsmc-rtc", NULL, NULL, 0, 0, "apple,smc-rtc"),
 };
 
 static int apple_smc_cmd_locked(struct apple_smc *smc, u64 cmd, u64 arg,