pinctrl: imx: scu: Align imx sc msg structs to 4

The imx SC api strongly assumes that messages are composed out of
4-bytes words but some of our message structs have odd sizeofs.

This produces many oopses with CONFIG_KASAN=y.

Fix by marking with __aligned(4).

Fixes: b96eea71 ("pinctrl: fsl: add scu based pinctrl support")
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Link: https://lore.kernel.org/r/bd7ad5fd755739a6d8d5f4f65e03b3ca4f457bd2.1582216144.git.leonard.crestez@nxp.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/freescale/pinctrl-scu.c

@@ -23,12 +23,12 @@ struct imx_sc_msg_req_pad_set {
 	struct imx_sc_rpc_msg hdr;
 	u32 val;
 	u16 pad;
-} __packed;
+} __packed __aligned(4);
 
 struct imx_sc_msg_req_pad_get {
 	struct imx_sc_rpc_msg hdr;
 	u16 pad;
-} __packed;
+} __packed __aligned(4);
 
 struct imx_sc_msg_resp_pad_get {
 	struct imx_sc_rpc_msg hdr;