[MIPS] IP27: remove duplicate extern dump_tlb_all() prototype

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/sgi-ip27/ip27-berr.c

@@ -21,8 +21,6 @@
 #include <asm/traps.h>
 #include <asm/uaccess.h>
 
-extern void dump_tlb_all(void);
-
 static void dump_hub_information(unsigned long errst0, unsigned long errst1)
 {
 	static char *err_type[2][8] = {