ASoC: pxa: use pdev resource for FIFO regs

The driver currently takes the hardwired FIFO address from
a header file that we want to eliminate. Change it to use
the mmio resource instead and stop including the here.

Acked-by: Mark Brown <broonie@kernel.org>
Cc: alsa-devel@alsa-project.org
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>