arm64: dts: sprd: adding coresight entries to Spreadtrum SC9836

Support only for ETF, FUNNEL, STM are included currently.
Support for ETM, TPIU and the replicator linked to it are not included in
this version patch.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>