Blackfin: add elf_machine_load_address() stub

The Blackfin port never defined elf_machine_load_address() because the one
place this code is called never matters to us.  But without it, common code
likes to hit a build failure, so stub it out.

ldso/ldso/dl-startup.c: In function '_dl_start':
ldso/ldso/dl-startup.c:170: warning: implicit declaration of function 'elf_machine_load_address'

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso/ldso/bfin/dl-sysdep.h

@@ -210,6 +210,14 @@ while (0)
 #endif
 
 #include <elf.h>
+
+static __always_inline Elf32_Addr
+elf_machine_load_address (void)
+{
+	/* this is never an issue on Blackfin systems, so screw it */
+	return 0;
+}
+
 static __always_inline void
 elf_machine_relative (DL_LOADADDR_TYPE load_off, const Elf32_Addr rel_addr,
 		      Elf32_Word relative_count)