arm64: make Timer Interrupt Frequency selectable

It allows a selectable timer interrupt frequency of 100, 250, 300 and 1000 HZ.
We will get better performance when choose a suitable frequency in some scene.

Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

arch/arm64/Kconfig

@@ -454,10 +454,7 @@ config HOTPLUG_CPU
 	  can be controlled through /sys/devices/system/cpu.
 
 source kernel/Kconfig.preempt
-
-config HZ
-	int
-	default 100
+source kernel/Kconfig.hz
 
 config ARCH_HAS_HOLES_MEMORYMODEL
 	def_bool y if SPARSEMEM