cpupower: mperf monitor: Correct use of ! and &

In commit ae91d60ba88ef0bdb1b5e9b2363bd52fc45d2af7, a bug was fixed that
involved converting !x & y to !(x & y).  The code below shows the same
pattern, and thus should perhaps be fixed in the same way.

The Coccinelle semantic patch that makes this change is as follows:

// <smpl>
@@ expression E1,E2; @@
(
  !E1 & !E2
|
- !E1 & E2
+ !(E1 & E2)
)
// </smpl>

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

tools/power/cpupower/utils/idle_monitor/mperf_monitor.c

@@ -237,7 +237,7 @@ static int init_maxfreq_mode(void)
 	unsigned long long hwcr;
 	unsigned long min;
 
-	if (!cpupower_cpu_info.caps & CPUPOWER_CAP_INV_TSC)
+	if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_INV_TSC))
 		goto use_sysfs;
 
 	if (cpupower_cpu_info.vendor == X86_VENDOR_AMD) {