armv8/ls1043ardb: add DSPI support

Use the U-Boot Driver Model. Just enable Freescale DSPI driver
and set DSPI related parameters in dts file.

Signed-off-by: Gong Qianyu <Qianyu.Gong@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
6 files changed