MAINTAINERS: cpufreq: amd-pstate: Add co-maintainers and reviewer

I'm happy to add Gautham and Mario as the co-maintainers, Perry as the
reviewer for amd-pstate driver.

Signed-off-by: Huang Rui <[email protected]>
Acked-by: Mario Limonciello <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

Author: huangrui

MAINTAINERS

@@ -1062,6 +1062,9 @@ F:	drivers/gpu/drm/amd/pm/
 
 AMD PSTATE DRIVER
 M:	Huang Rui <[email protected]>
+M:	Gautham R. Shenoy <[email protected]>
+M:	Mario Limonciello <[email protected]>
+R:	Perry Yuan <[email protected]>
 L:	[email protected]
 S:	Supported
 F:	Documentation/admin-guide/pm/amd-pstate.rst