tools: mkimage: fix build with recent LibreSSL

LibreSSL 3.5.0 and later (also shipped as part of OpenBSD 7.1 and
and later) have an opaque RSA object and do provide the
RSA_get0_* functions that OpenSSL provides.

Fixes: 2ecc354b8e46 ("tools: mkimage: fix build with LibreSSL")
Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
Reviewed-by: Jonathan Gray <jsg@jsg.id.au>
diff --git a/tools/sunxi_toc0.c b/tools/sunxi_toc0.c
index 56200bd..7a8d74b 100644
--- a/tools/sunxi_toc0.c
+++ b/tools/sunxi_toc0.c
@@ -34,7 +34,7 @@
 #define pr_warn(fmt, args...)	fprintf(stderr, pr_fmt(fmt), "warning", ##args)
 #define pr_info(fmt, args...)	fprintf(stderr, pr_fmt(fmt), "info", ##args)
 
-#if defined(LIBRESSL_VERSION_NUMBER)
+#if defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x3050000fL
 #define RSA_get0_n(key) (key)->n
 #define RSA_get0_e(key) (key)->e
 #define RSA_get0_d(key) (key)->d