drm/imx: turn remaining container_of macros into inline functions

This allows the compiler to do type checking.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index 520b312..a293a7d 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -98,8 +98,6 @@
 /* TVE_TST_MODE_REG */
 #define TVE_TVDAC_TEST_MODE_MASK	(0x7 << 0)
 
-#define con_to_tve(x) container_of(x, struct imx_tve, connector)
-
 enum {
 	TVE_MODE_TVOUT,
 	TVE_MODE_VGA,
@@ -124,6 +122,11 @@
 	struct clk *di_clk;
 };
 
+static inline struct imx_tve *con_to_tve(struct drm_connector *c)
+{
+	return container_of(c, struct imx_tve, connector);
+}
+
 static inline struct imx_tve *enc_to_tve(struct drm_encoder *e)
 {
 	return container_of(e, struct imx_tve, encoder);