gpio: tz1090: Fix error handling of irq_of_parse_and_map
gpio: tz1090: Fix error handling of irq_of_parse_and_map

irq_of_parse_and_map() returns 0 on error, so testing for negative
result never works.

Signed-off-by: Dmitry Torokhov <10a8c465cefc9bdd6c925e26964d23c90f1141cc@chromium.org>
Acked-by: James Hogan <547fa85bb3888a0222eed8ec39e36708605c6d53@imgtec.com>
Signed-off-by: Linus Walleij <9cd9d802d23c0ed5e224beabf4ae4a5c478746ef@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs