drm: fix warnings in DSC

Remove always false comparisons due to limited range of nfl_bpg_offset
and scale_increment_interval fields.
Warnings detected when compiling with W=1.

Signed-off-by: Benjamin Gaignard <[e-mail]>
Reviewed-by: Harry Wentland <[e-mail]>
Signed-off-by: Benjamin Gaignard <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_dsc.c

···
 	else
 		vdsc_cfg->nfl_bpg_offset = 0;
 
-	/* 2^16 - 1 */
-	if (vdsc_cfg->nfl_bpg_offset > 65535) {
-		DRM_DEBUG_KMS("NflBpgOffset is too large for this slice height\n");
-		return -ERANGE;
-	}
-
 	/* Number of groups used to code the entire slice */
 	groups_total = groups_per_line * vdsc_cfg->slice_height;
 
···
 		 * be used to disable the scale increment at the end of the slice
 		 */
 		vdsc_cfg->scale_increment_interval = 0;
-	}
-
-	if (vdsc_cfg->scale_increment_interval > 65535) {
-		DRM_DEBUG_KMS("ScaleIncrementInterval is large for slice height\n");
-		return -ERANGE;
 	}
 
 	/*