[PATCH] USB: fix gadget_is_musbhdrc()

I submitted the wrong version of the patch teaching about the driver
for Mentor's Highspeed Dual Role Controller (HDRC), whoops!  This
uses the right name for that driver.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>