drm/i915/psr: Use PSR2_MAN_TRK_CTL CFF bit only to send full update

We are preparing for a change where only frontbuffer flush will use
single full frame bit of a new register (SFF_CTL) available on LunarLake
onwards.

It shouldn't be necessary to have SFF bit set if CFF bit is set in
PSR2_MAN_TRK_CTL -> removing setting it on all platforms as there is not
reason to have it different on older platforms.

v2: commit message improved

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250213064804.2077127-2-jouni.hogander@intel.com

Author: hogander

drivers/gpu/drm/i915/display/intel_psr.c

@@ -2395,7 +2395,6 @@ static void psr2_man_trk_ctl_calc(struct intel_crtc_state *crtc_state,
 	val |= man_trk_ctl_partial_frame_bit_get(display);
 
 	if (full_update) {
-		val |= man_trk_ctl_single_full_frame_bit_get(display);
 		val |= man_trk_ctl_continuos_full_frame(display);
 		goto exit;
 	}