[MIPS] i8253.h: Remove all i8259 related definitions.

#define PIT_CH0			0x40

#define PIT_CH2			0x42

/* i8259A PIC registers */

#define PIC_MASTER_CMD		0x20

#define PIC_MASTER_IMR		0x21

#define PIC_MASTER_ISR		PIC_MASTER_CMD

#define PIC_MASTER_POLL		PIC_MASTER_ISR

#define PIC_MASTER_OCW3		PIC_MASTER_ISR

#define PIC_SLAVE_CMD		0xa0

#define PIC_SLAVE_IMR		0xa1

/* i8259A PIC related value */

#define PIC_CASCADE_IR		2

#define MASTER_ICW4_DEFAULT	0x01

#define SLAVE_ICW4_DEFAULT	0x01

#define PIC_ICW4_AEOI		2

extern void setup_pit_timer(void);

#endif /* __ASM_I8253_H */