arm64: remove wrong CONFIG_PROC_SYSCTL ifdef

The sysfs cpu_capacity entry for each CPU has nothing to do with
PROC_FS, nor it's in /proc/sys path.

Remove such ifdef.

Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reported-and-suggested-by: Sudeep Holla <sudeep.holla@arm.com>
Fixes: be8f185 ('arm64: add sysfs cpu_capacity attribute')
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

arch/arm64/kernel/topology.c

@@ -40,7 +40,6 @@ static void set_capacity_scale(unsigned int cpu, unsigned long capacity)
 	per_cpu(cpu_scale, cpu) = capacity;
 }
 
-#ifdef CONFIG_PROC_SYSCTL
 static ssize_t cpu_capacity_show(struct device *dev,
 				 struct device_attribute *attr,
 				 char *buf)
@@ -97,7 +96,6 @@ static int register_cpu_capacity_sysctl(void)
 	return 0;
 }
 subsys_initcall(register_cpu_capacity_sysctl);
-#endif
 
 static u32 capacity_scale;
 static u32 *raw_capacity;