drm/msm/dpu: simplify dpu_encoder_phys_wb_init()

There is no need to assign a result to temp varable just to return it
after a goto. Drop the temporary variable and goto and return the result
directly.
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Abhinav Kumar <quic_abhinavk@quicinc.com> # sc7280
Patchwork: https://patchwork.freedesktop.org/patch/540639/
Link: https://lore.kernel.org/r/20230601172236.564445-8-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -684,21 +684,18 @@ struct dpu_encoder_phys *dpu_encoder_phys_wb_init(
 {
 	struct dpu_encoder_phys *phys_enc = NULL;
 	struct dpu_encoder_phys_wb *wb_enc = NULL;
-	int ret = 0;
 
 	DPU_DEBUG("\n");
 
 	if (!p || !p->parent) {
 		DPU_ERROR("invalid params\n");
-		ret = -EINVAL;
-		goto fail_alloc;
+		return ERR_PTR(-EINVAL);
 	}
 
 	wb_enc = kzalloc(sizeof(*wb_enc), GFP_KERNEL);
 	if (!wb_enc) {
 		DPU_ERROR("failed to allocate wb phys_enc enc\n");
-		ret = -ENOMEM;
-		goto fail_alloc;
+		return ERR_PTR(-ENOMEM);
 	}
 
 	phys_enc = &wb_enc->base;
@@ -715,7 +712,4 @@ struct dpu_encoder_phys *dpu_encoder_phys_wb_init(
 	DPU_DEBUG("Created dpu_encoder_phys for wb %d\n", phys_enc->hw_wb->idx);
 
 	return phys_enc;
-
-fail_alloc:
-	return ERR_PTR(ret);
 }