gpio: search for gpio label if gpio is not found through bank name
dm_gpio_lookup_name() searches for a gpio through the bank name. But we have also gpio labels, and it makes sense to search for a gpio also in the labels we have defined, if no gpio is found through the bank name definition. This is useful for example if you have a wp pin on different gpios on different board versions. If dm_gpio_lookup_name() searches also for the gpio labels, you can give the gpio an unique label name and search for this label, and do not need to differ between board revisions. Signed-off-by: NHeiko Schocher <hs@denx.de> Reviewed-by: NSimon Glass <sjg@chromium.org> [trini: Don't enable by default] Signed-off-by: NTom Rini <trini@konsulko.com>
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