USB: ohci-nxp: Remove i2c_write(), use smbus

This patch removes the re-coded i2c_write function from the ohci-nxp driver
in favour of using just smbus functions.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>