drm/i915/display/adlp: Fix PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR calculation

As the SU_REGION_START begins at 0, the SU_REGION_END should be number
of lines - 1.

BSpec: 50424
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210914212507.177511-1-jose.souza@intel.com

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

@@ -1501,7 +1501,7 @@ static void psr2_man_trk_ctl_calc(struct intel_crtc_state *crtc_state,
 
 	if (IS_ALDERLAKE_P(dev_priv)) {
 		val |= ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(clip->y1);
-		val |= ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(clip->y2);
+		val |= ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(clip->y2 - 1);
 	} else {
 		drm_WARN_ON(crtc_state->uapi.crtc->dev, clip->y1 % 4 || clip->y2 % 4);