ARM: ux500: enable ux500 EXT4_FS and LBDAF support by default

EXT4 file system and LBDAF are used commonly, should be enabled by default.

Signed-off-by: Hongbo Zhang <hongbo.zhang@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>