mfd: pm8921-core: Add support for PMIC PM8922 chips

The PMIC PM8922 chip is very similar to the PM8921 chip.  Modify
the pm8921-core driver so that it can also handle PM8922 chips.

Change-Id: Ibae402ff65d1af4e0f18e4a66304f7ac609065b4
Signed-off-by: David Collins <collinsd@codeaurora.org>
diff --git a/drivers/mfd/pm8xxx-pwm.c b/drivers/mfd/pm8xxx-pwm.c
index 5b4f7e3..f65a183 100644
--- a/drivers/mfd/pm8xxx-pwm.c
+++ b/drivers/mfd/pm8xxx-pwm.c
@@ -1360,7 +1360,8 @@
 	version = pm8xxx_get_version(chip->dev->parent);
 
 	if (version == PM8XXX_VERSION_8921 ||
-			version == PM8XXX_VERSION_8058) {
+			version == PM8XXX_VERSION_8058 ||
+			version == PM8XXX_VERSION_8922) {
 		chip->is_lpg_supported = 1;
 	}
 	if (chip->is_lpg_supported) {