pinctrl: armada-37xx: remove an unused variable

This variable has never been used and can be removed to avoid a W=1 warning:

drivers/pinctrl/mvebu/pinctrl-armada-37xx.c:837:6: error: variable 'i' set but not used [-Werror,-Wunused-but-set-variable]
  837 |         int i = 0;

Fixes: 87466ccd ("pinctrl: armada-37xx: Add pin controller support for Armada 37xx")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Message-ID: <20240322132205.906729-1-arnd@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mvebu/pinctrl-armada-37xx.c

@@ -834,8 +834,6 @@ static int armada_37xx_gpiochip_register(struct platform_device *pdev,
 static int armada_37xx_add_function(struct armada_37xx_pmx_func *funcs,
 				    int *funcsize, const char *name)
 {
-	int i = 0;
-
 	if (*funcsize <= 0)
 		return -EOVERFLOW;
 
@@ -847,7 +845,6 @@ static int armada_37xx_add_function(struct armada_37xx_pmx_func *funcs,
 			return -EEXIST;
 		}
 		funcs++;
-		i++;
 	}
 
 	/* append new unique function */