[PATCH] fix memory leak in rocketport rp_do_receive

Fix memory leak caused by incorrect use of tty buffer facility.  tty
buffers are allocated but never processed by call to tty_flip_buffer_push
so they accumulate on the full buffer list.  Current code uses the buffers
as a temporary storage for data before passing it directly to the line
discipline.

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>