video: driver: Use vzalloc instead of kzalloc

kzalloc might fail to allocate physically contiguous
memory which may not be available always and hence use
vzalloc to allocate virtually contiguous memory

Change-Id: I8ad89ef107da301217f3d1ec307b9b27b4edd2de
Signed-off-by: Deepa Guthyappa Madivalara <quic_dmadival@quicinc.com>

driver/platform/common/src/msm_vidc_platform.c

@@ -342,7 +342,7 @@ int msm_vidc_deinit_platform(struct platform_device *pdev)
 	msm_vidc_deinit_vpu(core, &pdev->dev);
 	msm_vidc_deinit_platform_variant(core, &pdev->dev);
 
-	kfree(core->platform);
+	msm_vidc_vmem_free((void **)&core->platform);
 	return 0;
 }
 
@@ -366,9 +366,10 @@ int msm_vidc_init_platform(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	platform = kzalloc(sizeof(struct msm_vidc_platform), GFP_KERNEL);
-	if (!platform)
-		return -ENOMEM;
+	rc = msm_vidc_vmem_alloc(sizeof(struct msm_vidc_platform),
+			(void **)&platform, __func__);
+	if (rc)
+		return rc;
 
 	core->platform = platform;
 	platform->core = core;