Fix cpupower-frequency-info.1 man page typo

cpupower-frequency-info.1 man page type is incorrect for
related-cpus. Fix it.

utils/cpufreq-info.c
        {"related-cpus",  no_argument,   NULL,   'r'},
        {"affected-cpus", no_argument,   NULL,   'a'},

Fixed changelog before applying:
Shuah Khan <skhan@linuxfoundation.org>

Signed-off-by: Jan Kratochvil <jan@jankratochvil.net>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

Author: jankratochvil

tools/power/cpupower/man/cpupower-frequency-info.1

@@ -32,7 +32,7 @@ Gets the currently used cpufreq policy.
 \fB\-g\fR \fB\-\-governors\fR
 Determines available cpufreq governors.
 .TP  
-\fB\-a\fR \fB\-\-related\-cpus\fR
+\fB\-r\fR \fB\-\-related\-cpus\fR
 Determines which CPUs run at the same hardware frequency.
 .TP  
 \fB\-a\fR \fB\-\-affected\-cpus\fR