ASoC: omap: Update e-mail address of Jarkko Nikula

My gmail account got disabled and I'm not going to reopen it.

Signed-off-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>