soc: fsl: support GUTS driver for ls1012a/ls1046a

This patch is to add compatible strings "fsl,ls1021a-dcfg" and
"fsl,ls1043a-dcfg" into device match table of GUTS driver.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>