[MIPS] Fix data bus error recovery

With -ffunction-section the entries in __dbe_table aren't no longer
sorted, so the lookup of exception addresses in do_be() failed for
some addresses. To avoid this we now sort __dbe_table.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -373,8 +373,8 @@ void __noreturn die(const char * str, const struct pt_regs * regs)
 	do_exit(SIGSEGV);
 }
 
-extern const struct exception_table_entry __start___dbe_table[];
-extern const struct exception_table_entry __stop___dbe_table[];
+extern struct exception_table_entry __start___dbe_table[];
+extern struct exception_table_entry __stop___dbe_table[];
 
 __asm__(
 "	.section	__dbe_table, \"a\"\n"
@@ -1682,4 +1682,6 @@ void __init trap_init(void)
 
 	flush_icache_range(ebase, ebase + 0x400);
 	flush_tlb_handlers();
+
+	sort_extable(__start___dbe_table, __stop___dbe_table);
 }