Make sure the USB PHY is disabled after use.  Patch by Mihail Zenkov who has
measured several milliamps power reduction from having the PHY disabled.

Change-Id: I29e55222eb50acf2023ac1113a90612029c580af
Reviewed-on: http://gerrit.rockbox.org/988
Reviewed-by: Michael Giacomelli <giac2000@hotmail.com>
Tested: Michael Giacomelli <giac2000@hotmail.com>
2 files changed