gpio: Revert regression in sysfs-gpio (gpiolib.c)

gpio: Revert regression in sysfs-gpio (gpiolib.c)

Some GPIO lines have stopped working after the patch
commit 7e6393e4f9f05 ("gpio: Support GPIO controllers without pin-ranges")

And this has supposedly been fixed in the following patches
commit c18a08ebcb0e2 ("gpio: Avoid using pin ranges with !PINCTRL")
commit 5f02db45eada5 ("gpiolib: Don't free if pin ranges are not defined")

But an erratic behavior where some GPIO lines work while others do not work
has been introduced.

This patch reverts those changes so that the sysfs-gpio interface works
properly again.

Signed-off-by: Marcelo Roberto Jimenez <marcelo.jimenez@gmail.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>