[PATCH v4 2/4] docs/perf: Add documentation for the Amlogic G12 DDR PMU

[kernel test robot]

Hi Jiucheng,

I love your patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on arm/for-next arm64/for-next/core clk/clk-next kvmarm/next rockchip/for-next shawnguo/for-next soc/for-next linus/master v5.19 next-20220812]
[cannot apply to xilinx-xlnx/master keystone/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jiucheng-Xu/perf-amlogic-Add-support-for-Amlogic-meson-G12-SoC-DDR-PMU-driver/20220805-151704
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
reproduce: make htmldocs

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

>> Documentation/admin-guide/perf/meson-ddr-pmu.rst: WARNING: document isn't included in any toctree

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