mfd: 88pm886: Add the RTC cell

Add a MFD cell for the chip's Real-Time Clock (RTC).

Signed-off-by: Karel Balej <balejk@matfyz.cz>
Link: https://lore.kernel.org/r/20241012193345.18594-1-balejk@matfyz.cz
Signed-off-by: Lee Jones <lee@kernel.org>

Author: balejk

drivers/mfd/88pm886.c

@@ -37,6 +37,7 @@ static struct resource pm886_onkey_resources[] = {
 static struct mfd_cell pm886_devs[] = {
 	MFD_CELL_RES("88pm886-onkey", pm886_onkey_resources),
 	MFD_CELL_NAME("88pm886-regulator"),
+	MFD_CELL_NAME("88pm886-rtc"),
 };
 
 static int pm886_power_off_handler(struct sys_off_data *sys_off_data)