[media] s5p_mfc: remove a dead code

As reported by smatch:
	drivers/media/platform/s5p-mfc/s5p_mfc.c:1340 s5p_mfc_runtime_resume() warn: this array is probably non-NULL. 'm_dev->alloc_ctx'

alloc_ctx can never be NULL, as it is embeeded inside the struct
s5p_mfc_dev.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/s5p-mfc/s5p_mfc.c

@@ -1337,8 +1337,6 @@ static int s5p_mfc_runtime_resume(struct device *dev)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev);
 
-	if (!m_dev->alloc_ctx)
-		return 0;
 	atomic_set(&m_dev->pm.power, 1);
 	return 0;
 }