[PATCH] cs89x0: collect tx_bytes statistics

Signed-off-by: Ian Campbell <icampbell@arcom.com>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>