cpufreq: intel_pstate: Adjust frequency percentage computations

cpufreq: intel_pstate: Adjust frequency percentage computations

Adjust frequency percentage computations in update_cpu_qos_request() to
avoid going above the exact numerical percentage in the FREQ_QOS_MAX
case.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Zihuan Zhang <zhangzihuan@kylinos.cn>
Link: https://patch.msgid.link/3395556.44csPzL39Z@rafael.j.wysocki
[ rjw: Rename "cpu" to "cpudata" and "cpunum" to "cpu" ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>