usb-core: Remove Fix mes in file hcd.c

I am removing two fix mes in this file as after dicussing then it  seems
there is no reason to check against Null for usb_device as it can never
be NULL and this is check is therefore not needed.

Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>