When TX data URB reaches high water mark the message
"data: -ENOSR is returned" is printed.
This is not an error case, so change it to debug print.
Signed-off-by: NUjjal Roy <royujjal@gmail.com>
Signed-off-by: NBing Zhao <bzhao@marvell.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>