This commit adds the ADI AU1761 audio codec as a selectable option
in the kernel config.  Currently the driver can only be selected
for ADI blackfin devices or if SND_SOC_ALL_CODECS is enabled.
Signed-off-by: NBryce Ferguson <bryce.ferguson@rockwellcollins.com>
Signed-off-by: NMark Brown <broonie@kernel.org>