src: lib: compress: Add support for plugins

src: lib: compress: Add support for plugins

Add compress_open_by_name() and is_codec_supported_by_name()
to support plugins. Format of name is 'hw:<card>,<device>'
for hw compress nodes and '<plugin_name>:<custom_data>'
for virtual compress nodes. It dynamically loads the plugin
library whose name is libtinycompress_module_<plugin_name>.so.
Plugin library needs to expose compress_plugin_ops.
Default path of plugin lib is /usr/lib/tinycompress-lib/ and it
can be updated by defining TINYCOMPRESS_PLUGIN_DIR in makefile.

Signed-off-by: Rohit kumar <rohitkr@codeaurora.org>