ARM: dts: msm: Add qcom,dump-size entry for dumping CPU L1/L2 caches

Update arm cache documentation about qcom,dump-size to dump
the CPU L1/L2 caches in order to analyze data corruption.

Change-Id: Ia9350b9c7810db7eb900957b4ce5dac046ab5e0d
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>