Documentation: Update video bus sub node properties

  boot/dts/include/dt-bindings/msm/msm-bus-ids.h for list of acceptable slaves

Optional properties:

- qcom,bus-governor : governor to use when scaling bus, generally any commonly

  found devfreq governor might be used.  In addition to those governors, the

  custom Venus governors, "msm-vidc-ddr" or "msm-vidc-llcc" are also

  acceptable values.

  In the absence of this property the "performance" governor is used.

- qcom,bus-rage-kbps : an array of two items (<min max>) that indicate the

- qcom,bus-range-kbps : an array of two items (<min max>) that indicate the

  minimum and maximum acceptable votes for the bus.

  In the absence of this property <0 INT_MAX> is used.

- qcom,ubwc-10bit : UBWC 10 bit content has different bus requirements,

  this tag will be used to pick the appropriate bus as per the session profile

  as shown below in example.

- qcom,mode : Type of BW calculations to use.

		"performance" - Use highest valid BW vote.

		"venus-ddr", "venus-llcc" - Calculate for DDR, LLCC path.

Memory Heaps

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