[MTD] [NAND] at91_nand: Convert to generic GPIO API

No point in using an AT91-specific GPIO API when the generic API works
just as well.

Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
1 file changed