mx6sxsabresd was not in the master branch when the conversion to the new Kconfig style happened, so convert it now so that it can build again.
Signed-off-by: Fabio Estevam
CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6sxsabresd/imximage.cfg,MX6SX" CONFIG_ARM=y CONFIG_TARGET_MX6SXSABRESD=y
