MIPS: Loongson: pm: Remove redundant source code

The implmentation of loongson2e_power_off and loongson2e_halt is almostly
the same, just preserve one of them.
Signed-off-by: NWu Zhangjin <wuzj@lemote.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/lemote/lm2e/reset.c

@@ -29,16 +29,11 @@ static void loongson2e_halt(void)
 	while (1) ;
 }
 
-static void loongson2e_power_off(void)
-{
-	loongson2e_halt();
-}
-
 static int __init mips_reboot_setup(void)
 {
 	_machine_restart = loongson2e_restart;
 	_machine_halt = loongson2e_halt;
-	pm_power_off = loongson2e_power_off;
+	pm_power_off = loongson2e_halt;
 
 	return 0;
 }