ASoC: Add macros for signed TLV controls with callbacks

Merge series from Richard Fitzgerald <rf@opensource.cirrus.com>:

This adds SOC_DOUBLE_R_S_EXT_TLV and SOC_SINGLE_S_EXT_TLV macros for
signed TLV controls that need custom get/put callbacks. These will be
needed by future Cirrus codec drivers, but are not particularly exotic
so could be useful for others.