Revert "irq-gic-v3-its: It can't be initialized when the GICR had been cut"

ascend inclusion
category: bugfix
bugzilla: NA
CVE: NA

------------

It's specific code for ascend, so remove it.

This reverts commit 7e01980562a4e4acd2c471181c3001450de4cca0.
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/irqchip/irq-gic-v3-its.c

@@ -2420,7 +2420,6 @@ static void its_cpu_init_lpis_others(void __iomem *rbase, int cpu)
 static void its_cpu_init_collection_others(void __iomem *rbase,
 					   phys_addr_t phys_base, int cpu)
 {
-	u32 count;
 	struct its_node *its;
 
 	raw_spin_lock(&its_lock);
@@ -2446,32 +2445,6 @@ static void its_cpu_init_collection_others(void __iomem *rbase,
 			target = GICR_TYPER_CPU_NUMBER(target) << 16;
 		}
 
-		dsb(sy);
-
-		/* In FPGA, We need to check if the gicr has been cut,
-		 * and if it is, it can't be initialized
-		 */
-		count = 2000;
-		while (1) {
-			if (readl_relaxed(rbase + GICR_SYNCR) == 0)
-				break;
-
-			count--;
-			if (!count) {
-				pr_err("this gicr does not exist, or it's abnormal:%pK\n",
-					&phys_base);
-				break;
-			}
-			cpu_relax();
-			udelay(1);
-		}
-
-		if (count == 0)
-			break;
-
-		pr_info("its init other collection table, ITS:%pK, GICR:%pK, coreId:%u\n",
-			&its->phys_base, &phys_base, cpu);
-
 		/* Perform collection mapping */
 		its->collections[cpu].target_address = target;
 		its->collections[cpu].col_id = cpu;