[ARM] nommu: fix breakage caused by f9720205

Someone forgot to use 'ls include/asm-*/flat.h' or
'grep -r flat_get_addr_from_rp .' to find all architectures which
may be affected by their change.  Fix the fall out.
Noticed-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/flat.h

@@ -11,8 +11,9 @@
 #define	flat_argvp_envp_on_stack()		1
 #define	flat_old_ram_flag(flags)		(flags)
 #define	flat_reloc_valid(reloc, size)		((reloc) <= (size))
-#define	flat_get_addr_from_rp(rp, relval, flags) get_unaligned(rp)
+#define	flat_get_addr_from_rp(rp, relval, flags, persistent) get_unaligned(rp)
 #define	flat_put_addr_at_rp(rp, val, relval)	put_unaligned(val,rp)
 #define	flat_get_relocate_addr(rel)		(rel)
+#define	flat_set_persistent(relval, p)		0
 
 #endif /* __ARM_FLAT_H__ */