Make asn1_d2i_read_bio accessible from STORE

This is needed for the upcoming "file" scheme STORE loader.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3542)

crypto/asn1/a_d2i_fp.c

diff --git a/crypto/asn1/a_d2i_fp.c b/crypto/asn1/a_d2i_fp.c
index e5c1d0e..5fa4d0f 100644
--- a/crypto/asn1/a_d2i_fp.c
+++ b/crypto/asn1/a_d2i_fp.c
@@ -13,8 +13,7 @@
 #include "internal/numbers.h"
 #include <openssl/buffer.h>
 #include <openssl/asn1.h>
-
-static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);
+#include "internal/asn1_int.h"
 
 #ifndef NO_OLD_ASN1
 # ifndef OPENSSL_NO_STDIO
@@ -92,7 +91,7 @@
 
 #define HEADER_SIZE   8
 #define ASN1_CHUNK_INITIAL_SIZE (16 * 1024)
-static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
+int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
 {
     BUF_MEM *b;
     unsigned char *p;

crypto/include/internal/asn1_int.h

diff --git a/crypto/include/internal/asn1_int.h b/crypto/include/internal/asn1_int.h
index a2e2b17..8ff919c 100644
--- a/crypto/include/internal/asn1_int.h
+++ b/crypto/include/internal/asn1_int.h
@@ -99,3 +99,4 @@
 } /* ASN1_PCTX */ ;
 
 int asn1_valid_host(const ASN1_STRING *host);
+int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);