usb: add HAS_IOMEM dependency to USB_MUSB_TUSB6010

  CC      drivers/usb/musb/tusb6010.o
drivers/usb/musb/tusb6010.c: In function ‘tusb_musb_init’:
drivers/usb/musb/tusb6010.c:1133:2: error: implicit declaration of function ‘ioremap’ [-Werror=implicit-function-declaration]
  sync = ioremap(mem->start, resource_size(mem));
  ^
drivers/usb/musb/tusb6010.c:1133:7: warning: assignment makes pointer from integer without a cast [enabled by default]
  sync = ioremap(mem->start, resource_size(mem));
       ^
drivers/usb/musb/tusb6010.c:1162:4: error: implicit declaration of function ‘iounmap’ [-Werror=implicit-function-declaration]
    iounmap(sync);
    ^
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/musb/Kconfig

@@ -85,6 +85,7 @@ config USB_MUSB_DA8XX
 
 config USB_MUSB_TUSB6010
 	tristate "TUSB6010"
+	depends on HAS_IOMEM
 	depends on ARCH_OMAP2PLUS || COMPILE_TEST
 	depends on NOP_USB_XCEIV = USB_MUSB_HDRC # both built-in or both modules