[PATCH] USB: CREDITS: Add credits about the ZC0301 and ET61X[12]51 USB drivers

This patch adds credits about the ZC0301 and ET61X[12]51 USB drivers
which have been included in the mainline kernel recently.

Signed-off-by: Luca Risolia <luca.risolia@studio.unibo.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>