The OMAP2 platform data quirk is using the global GPIO numberspace
to obtain two WLAN GPIOs to drive power and xcvr reset GPIO
lines during start-up.

Rewrite the quirk to use a GPIO descriptor table so we avoid using
global GPIO numbers.

This gets rid of the final dependency on the legacy <linux/gpio.h>
header from the OMAP2/3 platforms.

Fixes: 92bf78b3 ("gpio: omap: use dynamic allocation of base")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>