gpio-uclass: fix off-by-one in gpio_request_list_by_name_nodev()

By the time we jump to the err label, count represents the number of
gpios we've successfully requested. So by subtracting one, we fail to
free the most recently requested.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed