drm/i915/dsc: Fix pic_width readout

pic_width when written into the PPS register is divided by the no.
of vdsc instances first but the actual variable that we compare it
to does not change i.e vdsc_cfg->pic_width hence when reading the
register back for pic_width it needs to be multiplied by
num_vdsc_instances rather than being divided.

Fixes: 8b70b569 ("drm/i915/vdsc: Fill the intel_dsc_get_pps_config function")
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230911193742.836063-1-suraj.kandpal@intel.com

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

@@ -879,7 +879,7 @@ static void intel_dsc_get_pps_config(struct intel_crtc_state *crtc_state)
 	/* PPS 2 */
 	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 2);
 
-	vdsc_cfg->pic_width = REG_FIELD_GET(DSC_PPS2_PIC_WIDTH_MASK, pps_temp) / num_vdsc_instances;
+	vdsc_cfg->pic_width = REG_FIELD_GET(DSC_PPS2_PIC_WIDTH_MASK, pps_temp) * num_vdsc_instances;
 	vdsc_cfg->pic_height = REG_FIELD_GET(DSC_PPS2_PIC_HEIGHT_MASK, pps_temp);
 
 	/* PPS 3 */