ARM: mx3/cpuimx35: mark otg_pdata and usbh1_pdata as maybe unused

This fixes

	arch/arm/mach-mx3/mach-cpuimx35.c:143: warning: 'otg_pdata' defined but not used
	arch/arm/mach-mx3/mach-cpuimx35.c:148: warning: 'usbh1_pdata' defined but not used

when USB_ULPI is not selected.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-mx3/mach-cpuimx35.c

@@ -118,12 +118,12 @@ static const struct mxc_nand_platform_data
 	.flash_bbt	= 1,
 };
 
-static struct mxc_usbh_platform_data otg_pdata = {
+static struct mxc_usbh_platform_data __maybe_unused otg_pdata = {
 	.portsc	= MXC_EHCI_MODE_UTMI,
 	.flags	= MXC_EHCI_INTERFACE_DIFF_UNI,
 };
 
-static struct mxc_usbh_platform_data usbh1_pdata = {
+static struct mxc_usbh_platform_data __maybe_unused usbh1_pdata = {
 	.portsc	= MXC_EHCI_MODE_SERIAL,
 	.flags	= MXC_EHCI_INTERFACE_SINGLE_UNI | MXC_EHCI_INTERNAL_PHY |
 		  MXC_EHCI_IPPUE_DOWN,