omap: n8x0: Mux i2s codec port pins for McBSP block

Bootloader on Nokia N800 and N810 muxes I2C codec port pins for EAC block.
As there is no driver and use for EAC, mux those pins for McBSP instead
since N810 ASoC drivers can use it.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>