msm: kgsl: enlarge the preemption counters buffer

The buffer is also used for KMD postamble after commit 27c8851a,
so make it as big as what it would have been (PAGE_SIZE) if we
had the priviledged scratch buffer to prevent override or overflow.

Signed-off-by: Chenyang Zhong <zhongcy95@gmail.com>
Signed-off-by: Sorayukii <sorayukii69@gmail.com>

drivers/gpu/msm/adreno_a6xx_preempt.c

@@ -775,8 +775,7 @@ int a6xx_preemption_init(struct adreno_device *adreno_dev)
 
 	/* Allocate mem for storing preemption counters */
 	ret = kgsl_allocate_global(device, &preempt->counters,
-		adreno_dev->num_ringbuffers *
-		A6XX_CP_CTXRECORD_PREEMPTION_COUNTER_SIZE, 0, 0,
+		PAGE_SIZE, 0, 0,
 		"preemption_counters");
 	if (ret)
 		goto err;