USB: tranzport.c: remove err() usage

err() was a very old USB-specific macro that I thought had
gone away.  This patch removes it from being used in the
driver and uses dev_err() instead.

CC: "David Täht" <d@teklibre.com>
CC: Hitoshi Nakamori <hitoshi.nakamori@gmail.com>
CC: "Ken O'Brien" <kernel@kenobrien.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>