gpio: dw: Add a trailing underscore to generated name

Previously, if there was no bank-name property, it was easy to have
confusing gpio names like "gpio1@08", instead of "gpio1@0_8". This patch
follows the example of the sifive gpio driver.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed