drm/msm/mdp5: drop workarounds specific to MDP5 1.0

With support for MSM8974v1 being removed from the driver, there is no
need to keep workarounds specific to that particular MDP5 revision. Drop
them, slightly simplifying the logic.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/713918/
Link: https://lore.kernel.org/r/20260325-mdp5-further-drop-mdp1-0-v1-1-5ccee47fd1aa@oss.qualcomm.com

Author: lumag

drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c

@@ -118,8 +118,6 @@ uint32_t mdp5_smp_calculate(struct mdp5_smp *smp,
 		u32 width, bool hdecim)
 {
 	const struct drm_format_info *info = drm_format_info(format->pixel_format);
-	struct mdp5_kms *mdp5_kms = get_kms(smp);
-	int rev = mdp5_cfg_get_hw_rev(mdp5_kms->cfg);
 	int i, hsub, nplanes, nlines;
 	uint32_t blkcfg = 0;
 
@@ -133,7 +131,7 @@ uint32_t mdp5_smp_calculate(struct mdp5_smp *smp,
 	 * U and V components (splits them from Y if necessary) and packs
 	 * them together, writes to SMP using a single client.
 	 */
-	if ((rev > 0) && (format->chroma_sample > CHROMA_FULL)) {
+	if (format->chroma_sample > CHROMA_FULL) {
 		nplanes = 2;
 
 		/* if decimation is enabled, HW decimates less on the
@@ -151,10 +149,6 @@ uint32_t mdp5_smp_calculate(struct mdp5_smp *smp,
 
 		n = DIV_ROUND_UP(fetch_stride * nlines, smp->blk_size);
 
-		/* for hw rev v1.00 */
-		if (rev == 0)
-			n = roundup_pow_of_two(n);
-
 		blkcfg |= (n << (8 * i));
 	}