ASoC: dapm: fix build errors for missing snd_soc_dapm_new_control symbol

Fix the following error:-

All error/warnings (new ones prefixed by >>):
>
>    sound/built-in.o: In function `soc_tplg_dapm_widget_create':
> >> :(.text+0x25a90): undefined reference to `snd_soc_dapm_new_control'

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>