The PINS conntrolled by the SPI bits in the GPIO_MODE register is always
7 and not 8 for nand mode.

Signed-off-by: Sven Eckelmann <sven@open-mesh.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46644 3c298f89-4303-0410-b956-a3cf2f4a3e73