enc_neon: cosmetics

fix/remove incorrect comments
+ whitespace

Change-Id: Id1b86beb23e5bf946e73c34ab7066b6ca177f33b
cosmetics:

* remove MIPS32 suffix from static function names
* fix a long line in enc_neon.c

Change-Id: Ia1294ae46f471b3eb1e9ba43c6aa1b29a7aeb447