cpufreq: Add MAINTAINERS entry for CPPC driver

Add a MAINTAINERS entry for the CPPC driver, with a list of reviewers
from multiple organizations.

Also sort the list alphabetically while doing so.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Author: vireshk

MAINTAINERS

@@ -6620,6 +6620,17 @@ M:	Bence Csókás <bence98@sch.bme.hu>
 S:	Maintained
 F:	drivers/i2c/busses/i2c-cp2615.c
 
+CPU FREQUENCY DRIVERS - CPPC CPUFREQ
+M:	"Rafael J. Wysocki" <rafael@kernel.org>
+M:	Viresh Kumar <viresh.kumar@linaro.org>
+R:	Jie Zhan <zhanjie9@hisilicon.com>
+R:	Lifeng Zheng <zhenglifeng1@huawei.com>
+R:	Pierre Gondois <pierre.gondois@arm.com>
+R:	Sumit Gupta <sumitg@nvidia.com>
+L:	linux-pm@vger.kernel.org
+S:	Maintained
+F:	drivers/cpufreq/cppc_cpufreq.c
+
 CPU FREQUENCY DRIVERS - VEXPRESS SPC ARM BIG LITTLE
 M:	Viresh Kumar <viresh.kumar@linaro.org>
 M:	Sudeep Holla <sudeep.holla@kernel.org>
@@ -6628,6 +6639,12 @@ S:	Maintained
 W:	http://www.arm.com/products/processors/technologies/biglittleprocessing.php
 F:	drivers/cpufreq/vexpress-spc-cpufreq.c
 
+CPU FREQUENCY DRIVERS - VIRTUAL MACHINE CPUFREQ
+M:	Saravana Kannan <saravanak@kernel.org>
+L:	linux-pm@vger.kernel.org
+S:	Maintained
+F:	drivers/cpufreq/virtual-cpufreq.c
+
 CPU FREQUENCY SCALING FRAMEWORK
 M:	"Rafael J. Wysocki" <rafael@kernel.org>
 M:	Viresh Kumar <viresh.kumar@linaro.org>
@@ -6647,12 +6664,6 @@ F:	kernel/sched/cpufreq*.c
 F:	rust/kernel/cpufreq.rs
 F:	tools/testing/selftests/cpufreq/
 
-CPU FREQUENCY DRIVERS - VIRTUAL MACHINE CPUFREQ
-M:	Saravana Kannan <saravanak@kernel.org>
-L:	linux-pm@vger.kernel.org
-S:	Maintained
-F:	drivers/cpufreq/virtual-cpufreq.c
-
 CPU HOTPLUG
 M:	Thomas Gleixner <tglx@kernel.org>
 M:	Peter Zijlstra <peterz@infradead.org>