USBIP: Remove unnecessary whitespace before newline characters.

In this file, in certain places, newline characters in pr_debug() calls had
whitespace before them. This patch removes this extraneous whitespace.

Signed-off-by: Akshay Joshi <me@akshayjoshi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>