drm/exynos/fimd: don't initialize 'ret' variable in fimd_probe()

We  set it in the beginning of the function, thus no need to set it at
initialization.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_fimd.c

@@ -1108,7 +1108,7 @@ static int fimd_probe(struct platform_device *pdev)
 	struct fimd_context *ctx;
 	struct device_node *i80_if_timings;
 	struct resource *res;
-	int ret = -EINVAL;
+	int ret;
 
 	if (!dev->of_node)
 		return -ENODEV;