ASoC: Add support for WM8962 GPIO outputs

The WM8962 features five GPIOs, add support for controlling their output
state via gpiolib.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/sound/soc/codecs/wm8962.h b/sound/soc/codecs/wm8962.h
index 6145399..fce1199 100644
--- a/sound/soc/codecs/wm8962.h
+++ b/sound/soc/codecs/wm8962.h
@@ -181,6 +181,7 @@
 #define WM8962_EQ39                             0x175
 #define WM8962_EQ40                             0x176
 #define WM8962_EQ41                             0x177
+#define WM8962_GPIO_BASE			0x200
 #define WM8962_GPIO_2                           0x201
 #define WM8962_GPIO_3                           0x202
 #define WM8962_GPIO_5                           0x204