ASoC: build failure with make eseries_pxa_defconfig

hi Mark,
In the case of build with "make eseries_pxa_defconfig;make", both i2c and spi support are not configured.
Thus CONFIG_REGMAP is default to disable.

Then I got below build error:

ERROR: "regmap_raw_write" [sound/soc/snd-soc-core.ko] undefined!
ERROR: "regmap_read" [sound/soc/snd-soc-core.ko] undefined!
ERROR: "regmap_write" [sound/soc/snd-soc-core.ko] undefined! make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2

Regards,
Axel

Meh, right. This is all due to Grant insisting on having direct registration functions for each bus, previously we could just select regmap.