Add prototype for ebsnet_fseek

Customer confirmed prototype was not present in vfile.h, added prototype to wolfSSL header.

wolfssl/wolfcrypt/wc_port.h

@@ -280,6 +280,8 @@ WOLFSSL_API int wolfCrypt_Cleanup(void);
     #include "vfapi.h"
     #include "vfile.h"
 
+    int ebsnet_fseek(int a, long b, int c); /* Not prototyped in vfile.h per EBSnet feedback */
+
     #define XFILE                    int
     #define XFOPEN(NAME, MODE)       vf_open((const char *)NAME, VO_RDONLY, 0);
     #define XFSEEK                   ebsnet_fseek