DPE: Validate the command output arguments

Validate the output parameters before the command is encoded.

Signed-off-by: Tamas Ban <tamas.ban@arm.com>
Signed-off-by: Maulik Patel <maulik.patel@arm.com>
Change-Id: I24fb052628e3f65a87bfaafcda20aeb355695541
1 file changed