gpio: Add support for Qualcomm gpio controller

Add support for gpio controllers on Qualcomm Snapdragon devices.
This devices are usually called Top Level Mode Multiplexing in
Qualcomm documentation.

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index ea6e2ed..4162c3c 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -50,3 +50,4 @@
 obj-$(CONFIG_HIKEY_GPIO)	+= hi6220_gpio.o
 obj-$(CONFIG_PIC32_GPIO)	+= pic32_gpio.o
 obj-$(CONFIG_MVEBU_GPIO)	+= mvebu_gpio.o
+obj-$(CONFIG_MSM_GPIO)		+= msm_gpio.o