A little patch to fix rs690 bug:

Hi,

Attachment is a little patch to fix rs690 bug about GPPSB configuration.

Signed-off-by: Maggie Li <maggie.li@amd.com>

Reviewed-by: Zheng Bao <Zheng.bao@amd.com>

Please check it, thanks.

<<fix_rs690_bug.patch>>

Maggie li