m68k/irq: Remove obsolete IRQ_FLG_* definitions

#define IRQ_USER	8

/*

 * various flags for request_irq() - the Amiga now uses the standard

 * mechanism like all other architectures - IRQF_DISABLED and

 * IRQF_SHARED are your friends.

 */

#ifndef MACH_AMIGA_ONLY

#define IRQ_FLG_LOCK	(0x0001)	/* handler is not replaceable	*/

#define IRQ_FLG_REPLACE	(0x0002)	/* replace existing handler	*/

#define IRQ_FLG_FAST	(0x0004)

#define IRQ_FLG_SLOW	(0x0008)

#define IRQ_FLG_STD	(0x8000)	/* internally used		*/

#endif

struct irq_data;

struct irq_chip;

struct irq_desc;