drm/msm/adreno: fix a743 and a740 cx mem init

Disable the call to qcom_scm_gpu_init_regs() for a730 and a740
after init failures on the HDK8550 and HDK8450 platforms:
msm_dpu ae01000.display-controller: failed to load adreno gpu
msm_dpu ae01000.display-controller: failed to bind 3d00000.gpu (ops a3xx_ops [msm]): -5
msm_dpu ae01000.display-controller: adev bind failed: -5

While debugging, it happens the call to:
qcom_scm_gpu_init_regs(QCOM_SCM_GPU_ALWAYS_EN_REQ)
returns -5 and makes the gpu fail to initialize.

Remove the scm call since it's not done downstream either and
works fine without.

Fixes: 14b27d5d ("drm/msm/a7xx: Initialize a750 "software fuse"")
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/600972/Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/adreno/a6xx_gpu.c

@@ -1739,14 +1739,9 @@ static int a7xx_cx_mem_init(struct a6xx_gpu *a6xx_gpu)
 					 REG_A7XX_CX_MISC_SW_FUSE_VALUE);
 		adreno_gpu->has_ray_tracing =
 			!!(fuse_val & A7XX_CX_MISC_SW_FUSE_VALUE_RAYTRACING);
-	} else {
-		if (adreno_is_a740(adreno_gpu)) {
-			/* Raytracing is always enabled on a740 */
-			adreno_gpu->has_ray_tracing = true;
-		}
-
-		if (qcom_scm_is_available())
-			return qcom_scm_gpu_init_regs(QCOM_SCM_GPU_ALWAYS_EN_REQ);
+	} else if (adreno_is_a740(adreno_gpu)) {
+		/* Raytracing is always enabled on a740 */
+		adreno_gpu->has_ray_tracing = true;
 	}
 
 	return 0;