feat(scmi): add i.MX9 SCMI vendor CPU protocol

Add i.MX9 SCMI vendor specific CPU protocol

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ranjani Vaidyanathan <ranjani.vaidyanathan@nxp.c

feat(scmi): add i.MX9 SCMI vendor CPU protocol

Add i.MX9 SCMI vendor specific CPU protocol

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ranjani Vaidyanathan <ranjani.vaidyanathan@nxp.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: Icc81bf9f4a32c08e4a3c358b1cf561ca4345a431

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feat(scmi): add base protocol agent API

Support protocol attributes and discover agents

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: I3879f703ec61

feat(scmi): add base protocol agent API

Support protocol attributes and discover agents

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: I3879f703ec6160bd794f48e3c41718ecce0ec88a

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fix(scmi): induce a delay in monitoring SCMI channel status

Reading the SCMI mailbox status in polling mode causes a burst of bus
accesses. On certain platforms, this would not be ideal as the share

fix(scmi): induce a delay in monitoring SCMI channel status

Reading the SCMI mailbox status in polling mode causes a burst of bus
accesses. On certain platforms, this would not be ideal as the shared
bus on the CPU subsystem might cause contentions across all the CPUs.
So allow platforms to specify a delay to be introduced while polling.

Change-Id: Ib90ad7b5954854071cfd543f4a27a178dde3d5c6
Signed-off-by: Pranav Madhu <pranav.madhu@arm.com>

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fix(tree): correct some typos

found using codespell (https://github.com/codespell-project/codespell).

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Change-Id: I1bfa797e3460adddeefa916bb68e22beddaf6

fix(tree): correct some typos

found using codespell (https://github.com/codespell-project/codespell).

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Change-Id: I1bfa797e3460adddeefa916bb68e22beddaf6373

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