mtd/spi: Add support for SST25WF040B

Add support for SST25WF040B-40I-SN flash.
Tested on T1024QDS board.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
1 file changed