drm/msm/dpu: drop unused memory allocation

Drop the dpu_cfg variable and corresponding kzalloc, which became unused
after changing hw catalog to static configuration.

Fixes: de7d480f5e8c ("drm/msm/dpu: make dpu hardware catalog static const")
Reported-by: kernel test robot <[e-mail]>
Reported-by: Dan Carpenter <[e-mail]>
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Abhinav Kumar <[e-mail]>
Patchwork: https://patchwork.freedesktop.org/patch/498738/
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Signed-off-by: Rob Clark <[e-mail]>

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

···
 const struct dpu_mdss_cfg *dpu_hw_catalog_init(u32 hw_rev)
 {
 	int i;
-	struct dpu_mdss_cfg *dpu_cfg;
-
-	dpu_cfg = kzalloc(sizeof(*dpu_cfg), GFP_KERNEL);
-	if (!dpu_cfg)
-		return ERR_PTR(-ENOMEM);
 
 	for (i = 0; i < ARRAY_SIZE(cfg_handler); i++) {
 		if (cfg_handler[i].hw_rev == hw_rev)