usb: phy: export ulpi_viewport_access_ops

In order to build a ULPI PHY driver as a module, this symbol needs to
be exported.

Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
[swarren, reworked Manjunath's patches to split them more logically]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Felipe Balbi <balbi@ti.com>
Tested-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/phy/phy-ulpi-viewport.c

@@ -12,6 +12,7 @@
  *
  */
 
+#include <linux/export.h>
 #include <linux/kernel.h>
 #include <linux/usb.h>
 #include <linux/io.h>
@@ -78,3 +79,4 @@ struct usb_phy_io_ops ulpi_viewport_access_ops = {
 	.read	= ulpi_viewport_read,
 	.write	= ulpi_viewport_write,
 };
+EXPORT_SYMBOL_GPL(ulpi_viewport_access_ops);