pinctrl: qcom: spmi-gpio: Add support for GPIO LV/MV subtype

GPIO LV (low voltage)/MV (medium voltage) subtypes have different
features and register mappings than 4CH/8CH subtypes. Add support
for LV and MV subtypes.

Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

include/dt-bindings/pinctrl/qcom,pmic-gpio.h

@@ -98,6 +98,8 @@
 #define PMIC_GPIO_FUNC_PAIRED		"paired"
 #define PMIC_GPIO_FUNC_FUNC1		"func1"
 #define PMIC_GPIO_FUNC_FUNC2		"func2"
+#define PMIC_GPIO_FUNC_FUNC3		"func3"
+#define PMIC_GPIO_FUNC_FUNC4		"func4"
 #define PMIC_GPIO_FUNC_DTEST1		"dtest1"
 #define PMIC_GPIO_FUNC_DTEST2		"dtest2"
 #define PMIC_GPIO_FUNC_DTEST3		"dtest3"