ARM: davinci: dm644x-evm: fix label names in GPIO lookup entries

Since commit 587f7a69 ("gpio: davinci: Use dev name for label and
automatic base selection") the gpiochip label no longer has an ID
suffix. Update the GPIO lookup entries.

Fixes: 587f7a69 ("gpio: davinci: Use dev name for label and automatic base selection")
Cc: stable@vger.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>