MAINTAINERS: Update AMD POWERPLAY pattern

commit e098bc9612c2 ("drm/amd/pm: optimize the power related source code layout")
moved the directory, update the F: file pattern to match.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed