arm64: a37xx: pinctrl: Remove unused macro PIN_GRP()

Macro PIN_GRP() is not used, remove it.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
index a5407a1..32b49f1 100644
--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
@@ -99,16 +99,6 @@
 	unsigned int			nfuncs;
 };
 
-#define PIN_GRP(_name, _start, _nr, _mask, _func1, _func2)	\
-	{					\
-		.name = _name,			\
-		.start_pin = _start,		\
-		.npins = _nr,			\
-		.reg_mask = _mask,		\
-		.val = {0, _mask},		\
-		.funcs = {_func1, _func2}	\
-	}
-
 #define PIN_GRP_GPIO_0(_name, _start, _nr)	\
 	{					\
 		.name = _name,			\