[MIPS] Remove duplicate declarations from Alchemy code.

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/au1000/common/setup.c

@@ -49,11 +49,7 @@ extern void __init board_setup(void);
 extern void au1000_restart(char *);
 extern void au1000_halt(void);
 extern void au1000_power_off(void);
-extern struct resource ioport_resource;
-extern struct resource iomem_resource;
-extern void (*board_time_init)(void);
 extern void au1x_time_init(void);
-extern void (*board_timer_setup)(struct irqaction *irq);
 extern void au1x_timer_setup(struct irqaction *irq);
 extern void au1xxx_time_init(void);
 extern void au1xxx_timer_setup(struct irqaction *irq);