MIPS: PowerTV: Remove mips_machine_halt()

mips_machine_halt() is same as mips_machine_restart().  Also delete the
registration of _machine_halt and pm_power_off because mips_machine_halt()
is the restart function.
Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/798/Reviewed-by: David VomLehn <dvomlehn@cisco.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/powertv/reset.c

@@ -28,9 +28,6 @@
 #include <asm/mach-powertv/asic_regs.h>
 #include "reset.h"
 
-static void mips_machine_restart(char *command);
-static void mips_machine_halt(void);
-
 static void mips_machine_restart(char *command)
 {
 #ifdef CONFIG_BOOTLOADER_DRIVER
@@ -44,22 +41,7 @@ static void mips_machine_restart(char *command)
 #endif
 }
 
-static void mips_machine_halt(void)
-{
-#ifdef CONFIG_BOOTLOADER_DRIVER
-	/*
-	 * Call the bootloader's reset function to ensure
-	 * that persistent data is flushed before hard reset
-	 */
-	kbldr_SetCauseAndReset();
-#else
-	writel(0x1, asic_reg_addr(watchdog));
-#endif
-}
-
 void mips_reboot_setup(void)
 {
 	_machine_restart = mips_machine_restart;
-	_machine_halt = mips_machine_halt;
-	pm_power_off = mips_machine_halt;
 }