USB: musb: Remove my email address from few musb related drivers

This email address is going to expire soon and my contribution to musb
is next to zero so remove it.

Signed-off-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Cc: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>