* cipher/kyber-common.c (load24_littleendian, cbd3): Fix the
compile-time condition.
(poly_cbd_eta1, poly_cbd_eta2): Remove.
(zetas): Don't export.
(poly_compress): Remove.
(poly_compress_128, poly_compress_160): New.
(poly_decompress): Remove.
(poly_decompress_128, poly_decompress_160): New.
(poly_getnoise_eta1): Remove.
(poly_getnoise_eta1_2): New.  Directly call cbd3.
(poly_getnoise_eta1_3_4): New.  Directly call cbd2.
(poly_getnoise_eta2):  Directly call cbd2.
* cipher/kyber.c: Fix declarations for poly_compress,
poly_decompress and poly_getnoise_eta1.