sched: Move the priority specific bits into a new header file

#include <uapi/linux/sched.h>

#include <linux/sched/prio.h>

struct sched_param {

	int sched_priority;

#ifndef _SCHED_PRIO_H

#define _SCHED_PRIO_H

/*

 * Priority of a process goes from 0..MAX_PRIO-1, valid RT

 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH

 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority

 * values are inverted: lower p->prio value means higher priority.

 *

 * The MAX_USER_RT_PRIO value allows the actual maximum

 * RT priority to be separate from the value exported to

 * user-space.  This allows kernel threads to set their

 * priority to a value higher than any user task. Note:

 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.

 */

#define MAX_USER_RT_PRIO	100

#define MAX_RT_PRIO		MAX_USER_RT_PRIO

#define MAX_PRIO		(MAX_RT_PRIO + 40)

#define DEFAULT_PRIO		(MAX_RT_PRIO + 20)

#endif /* _SCHED_PRIO_H */

#ifndef _SCHED_RT_H

#define _SCHED_RT_H

/*

 * Priority of a process goes from 0..MAX_PRIO-1, valid RT

 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH

 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority

 * values are inverted: lower p->prio value means higher priority.

 *

 * The MAX_USER_RT_PRIO value allows the actual maximum

 * RT priority to be separate from the value exported to

 * user-space.  This allows kernel threads to set their

 * priority to a value higher than any user task. Note:

 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.

 */

#define MAX_USER_RT_PRIO	100

#define MAX_RT_PRIO		MAX_USER_RT_PRIO

#define MAX_PRIO		(MAX_RT_PRIO + 40)

#define DEFAULT_PRIO		(MAX_RT_PRIO + 20)

#include <linux/sched/prio.h>

static inline int rt_prio(int prio)

{