pinctrl: armada-37xx: remove an unused variable

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: 87466ccd9401 ("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>