MAINTAINERS: add maintainer entry for FREESCALE QUAD SPI driver

Add a maintainer entry for FREESCALE QUAD SPI driver and add myself as a
maintainer.

Signed-off-by: Han Xu <han.xu@freescale.com>
Acked-by: Huang Shijie <shijie.huang@intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
1 file changed