The setting has been lost during the transition to 3.18.
The CONFIG_M25PXX_PREFER_SMALL_SECTOR_ERASE option is not
available anymore, so use CONFIG_MTD_SPI_NOR_USE_4K_SECTORS
instead.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 45161