usb: gadget: Fix copy/pasted error message

usb: gadget: Fix copy/pasted error message

BugLink: http://bugs.launchpad.net/bugs/1710646
[ Upstream commit 43aef5c2ca90535b3227e97e71604291875444ed ]

This fixes an error message that was probably copied and pasted. The same
message is used for both the in and out endpoints, so it makes it impossible
to know which one actually failed because both cases say "IN".

Make the out endpoint error message say "OUT".

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>