ARM: imx: cleanup otg_mode

Cleanup the code for the otg_mode command line param:
* Use the bool type as it applies here.
* Qualify otg_mode_host with __initdata since this variable is only used in this
  context.
* The __setup functions are not supposed to return a status code, but a boolean
  indicating whether the param has been handled. See obsolete_checksetup() in
  init/main.c.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-imx/mach-pca100.c

@@ -298,18 +298,18 @@ static const struct fsl_usb2_platform_data otg_device_pdata __initconst = {
 	.phy_mode       = FSL_USB2_PHY_ULPI,
 };
 
-static int otg_mode_host;
+static bool otg_mode_host __initdata;
 
 static int __init pca100_otg_mode(char *options)
 {
 	if (!strcmp(options, "host"))
-		otg_mode_host = 1;
+		otg_mode_host = true;
 	else if (!strcmp(options, "device"))
-		otg_mode_host = 0;
+		otg_mode_host = false;
 	else
 		pr_info("otg_mode neither \"host\" nor \"device\". "
 			"Defaulting to device\n");
-	return 0;
+	return 1;
 }
 __setup("otg_mode=", pca100_otg_mode);