imx8: use ROM API wrappers in spl_imx_romapi.c

Simplify the use of the ROM API by using the wrappers that take care
of saving/restoring gd and computing the xor value. This makes the
generated code smaller and the C code easier to read.

Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
1 file changed