linux-phytec-fsl

gpio: remove unneeded initializer in gpiochip_add_to_list()

This variable is used as an iterator and initialized in the
list_for_each() loop.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>