[PATCH] USB: g_ether, highspeed conformance fix

Be sure to record the peripheral's ep0 maxpacket size BEFORE using
that to initialize the (high speed) device qualifier; that helps a
lot with USBCV testing.

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