tests: Use global_request for SET commands in test_p2p_grpform

When the 'SET' command is used to configure parameters related to P2P
operation use the global control interface and not the per interface one
as otherwise the setting will only have effect on the interface and will
work if a dedicated P2P_DEVICE is used.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
1 file changed