Fix indentation

Conform to coding guidelines.
Reviewed-by: NPaul Dale <paul.dale@oracle.com>
Reviewed-by: NStephen Henson <steve@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3989)

crypto/kdf/hkdf.c

@@ -150,7 +150,7 @@ static int pkey_hkdf_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
 
     if (strcmp(type, "md") == 0)
         return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_DERIVE,
-                EVP_PKEY_CTRL_HKDF_MD, value);
+                               EVP_PKEY_CTRL_HKDF_MD, value);
 
     if (strcmp(type, "salt") == 0)
         return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_HKDF_SALT, value);