spade: add ION support

Adapted from vision commit: https://github.com/Andromadus/htc7x30-3.0/commit/e4ec08e415b730ace05338547064ce1b6fd8bf09
Clean up some non-critical complains (Juansheng)

Adapted from: https://github.com/Andromadus/htc7x30-3.0/commit/508a77245d9b08393bb5d4bb506a88b80cbe6631
spade: Lets disable pmem_audio completely (Juansheng)

Original commit for vision: https://github.com/Andromadus/htc7x30-3.0/commit/5c0ebed2ef1f181c2da8f5c2772527db66284974
update defconfigs