* src/fips.c (_gcry_fips_indicator): rename to
  _gcry_fips_indicator_cipher().
  (_gcry_fips_indicator_kdf): New function.
* src/g10lib.h: Rename _gcry_fips_indicator to
  _gcry_fips_indicator_cipher() and add _gcry_fips_indicator_kdf()
* src/gcrypt.h.in (enum gcry_ctl_cmds): Add
  GCRYCTL_FIPS_SERVICE_INDICATOR_CIPHER and
  GCRYCTL_FIPS_SERVICE_INDICATOR_KDF.
* src/global.c (_gcry_vcontrol): Implement support for KDF FIPS
  Indicator separate from the cipher one.