drm/msm/dpu: remove hard-coded linewidth limit for writeback

Remove the hard-coded limit for writeback and lets start using
the one from catalog instead.

changes in v3:
	- correct the Fixes tag

Fixes: d7d0e73f ("drm/msm/dpu: introduce the dpu_encoder_phys_* for writeback")
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/489888/
Link: https://lore.kernel.org/r/1655406084-17407-3-git-send-email-quic_abhinavk@quicinc.comSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c

@@ -20,8 +20,6 @@
 #include "dpu_crtc.h"
 #include "disp/msm_disp_snapshot.h"
 
-#define DEFAULT_MAX_WRITEBACK_WIDTH 2048
-
 #define to_dpu_encoder_phys_wb(x) \
 	container_of(x, struct dpu_encoder_phys_wb, base)
 
@@ -278,9 +276,9 @@ static int dpu_encoder_phys_wb_atomic_check(
 		DPU_ERROR("invalid fb h=%d, mode h=%d\n", fb->height,
 				  mode->vdisplay);
 		return -EINVAL;
-	} else if (fb->width > DEFAULT_MAX_WRITEBACK_WIDTH) {
+	} else if (fb->width > phys_enc->hw_wb->caps->maxlinewidth) {
 		DPU_ERROR("invalid fb w=%d, maxlinewidth=%u\n",
-				  fb->width, DEFAULT_MAX_WRITEBACK_WIDTH);
+				  fb->width, phys_enc->hw_wb->caps->maxlinewidth);
 		return -EINVAL;
 	}