Merge "Documentation: msm: Update qcom,board-id property description"

device trees, some of which may not be compatible with the actual hardware.  It

is the bootloader's responsibility to pass the correct device tree to the kernel.

Format:

Legacy format:

It is expected that the qcom,board-id entry be at the top level of the device

tree structure.  The format of the entry is:

   qcom,board-id = <platform_id, subtype_id> [, <p2, s2> ...]

where platform_id and subtype_id are the numeric values for the platform and

subtype of the current hardware.

Modern format:

The cell layout of the qcom,board-id property is as follows:

   qcom,board-id = <board_id, reserved>

where board_id is a 32-bit integer whose bit values are defined as follows:

    bits 31-24 = Platform Subtype ID

    bits 23-16 = Platform Version (Major)

    bits 15-8  = Platform Version (Minor)

    bits  7-0  = Platform Type ID

and the 'reserved' cell shall have the value 0

In the event that a given device tree is applicable to all hardware versions

matching a given Platform Type / Subtype ID, the major/minior platform version

fields in the board_id property shall both be specified as 0xff.

Example:

   qcom,board-id = <15 0>;

   qcom,board-id = <0x01040708, 0>;

   qcom,board-id = <0x01ffff08, 0>;