Revert half of "ANDROID: vendor_hooks: Add param for android_vh_cpu_up/down"

This reverts half of commit 496b17304a.

This hook is not used, so the param is not needed at all.  Step on the
way to remove the hook entirely.

Bug: 203756332
Bug: 203492840
Cc: Liujie Xie <xieliujie@oppo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I84c021f1139e0bbadc3573211a8ee8a24273f5e9

include/trace/hooks/cpu.h

@@ -15,8 +15,8 @@ DECLARE_HOOK(android_vh_cpu_up,
 	TP_ARGS(cpu));
 
 DECLARE_HOOK(android_vh_cpu_down,
-	TP_PROTO(unsigned int cpu),
-	TP_ARGS(cpu));
+	TP_PROTO(void *unused),
+	TP_ARGS(unused));
 
 /* macro versions of hooks are no longer required */
 

kernel/cpu.c

@@ -1127,7 +1127,7 @@ static int cpu_down(unsigned int cpu, enum cpuhp_state target)
 {
 	int err;
 
-	trace_android_vh_cpu_down(cpu);
+	trace_android_vh_cpu_down(NULL);
 
 	cpu_maps_update_begin();
 	err = cpu_down_maps_locked(cpu, target);