ls1088a: ddr: configure DDR for 0.9v for VID support

When VID feature is supported, check the contents of fuse register
and configure DDR operate at 0.9v.

Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>