crypto: lib/blake2s - Move selftest prototype into header file

commit ce0d5d63e897cc7c3a8fd043c7942fc6a78ec6f4 upstream.

This patch fixes a missing prototype warning on blake2s_selftest.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/crypto/internal/blake2s.h

@@ -16,6 +16,8 @@ void blake2s_compress_generic(struct blake2s_state *state,const u8 *block,
 void blake2s_compress_arch(struct blake2s_state *state,const u8 *block,
 			   size_t nblocks, const u32 inc);
 
+bool blake2s_selftest(void);
+
 static inline void blake2s_set_lastblock(struct blake2s_state *state)
 {
 	state->f[0] = -1;