drm: remove writeq/readq function definitions

#include <linux/interrupt.h>	/* For task queue support */

#include <linux/sched/signal.h>

#include <linux/delay.h>

#ifndef readq

static inline u64 readq(void __iomem *reg)

{

	return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32);

}

static inline void writeq(u64 val, void __iomem *reg)

{

	writel(val & 0xffffffff, reg);

	writel(val >> 32, reg + 0x4UL);

}

#endif

#include <linux/io-64-nonatomic-lo-hi.h>

/** Current process ID */

#define DRM_CURRENTPID			task_pid_nr(current)