Merge series "ASoC: Constify snd_compress_ops" from Rikard Falkeborn <rikard.falkeborn@gmail.com>:
The only use of the static and global snd_compress_ops structs is to
assign their address to the compress_ops field in the
snd_soc_component_driver struct which is a pointer to const. Make them
const to allow the compiler to put them in read-only memory.