drivers: power: pmic: Add support for rn5t568 PMIC

Add support for the rn5t568 PMIC to the rn5t567 driver.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Reviewed-by: Jaehoon Chung <j80.chung@samsung.com>
diff --git a/drivers/power/pmic/rn5t567.c b/drivers/power/pmic/rn5t567.c
index d9a8298..9d103dd 100644
--- a/drivers/power/pmic/rn5t567.c
+++ b/drivers/power/pmic/rn5t567.c
@@ -53,6 +53,7 @@
 
 static const struct udevice_id rn5t567_ids[] = {
 	{ .compatible = "ricoh,rn5t567" },
+	{ .compatible = "ricoh,rn5t568" },
 	{ }
 };