commit a0a37183

 "ARM: omap: merge GPMC initialization code for
all platform" needs CONFIG_NOR, CONFIG_NAND or CONFIG_CMD_ONENAND
to be set to access flash. Add CONFIG_NAND for tam3517 derived
boards to prevent the following error: "nand: error: Unable to
find NAND settings in GPMC Configuration - quitting"

cc: Stefano Babic <sbabic@denx.de>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>