Add sc7180 camss subsys support

SM7125 is the SoC found in the Xiaomi Redmi Note 9 Pro(joyeuse) cellphone.
This series adds support to bring up the CSIPHY, CSID, VFE/RDI interfaces.

Since SM7125 is a low-speed variant of SC7180, SC7180 testers please
take a look and have a test as well.

sc7180 provides

- 2 x VFE
- 1 x VFE Lite
- 2 x CSID
- 1 x CSID Lite
- 4 x CSI PHY

The sc7180-camss binding should be comaptible with sdm845 yaml.
I've copied a new yaml from sdm845-camss.yaml, strip all _src clk and
put new maintainer information. If this is not desirable then i can add binding to
existing sdm845 yaml instead.

In addition, a bootable tree of sm7125/joyeuse is availble at:
https://github.com/99degree/linux/tree/camss
  

To: Robert Foss <[email protected]>
To: Todor Tomov <[email protected]>
To: Bryan O'Donoghue <[email protected]>
To: Mauro Carvalho Chehab <[email protected]>
To: Rob Herring <[email protected]>
To: Krzysztof Kozlowski <[email protected]>
To: Conor Dooley <[email protected]>
To: [email protected]
To: Bjorn Andersson <[email protected]>
To: Konrad Dybcio <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: George Chan <[email protected]>

---
Changes in v3:
- Align email title to sc8280xp series - krzk
- Line-up dt-binding example ordering to same as qcom,sm8250-camss.yaml - krzk 
- Drop non-related patches #5 #6 torvalds#7
- Add RFT tag to all patches, since no tested-by at all.
- Drop required-opps node from dt
- Link to v2: https://lore.kernel.org/r/[email protected]

Changes in v2:
- Revised dt-binding title - krzk
- Revised dt-binding maintainers - krzk
- Drop all dt-binding minItems - krzk
- Drops "|" symbol postfixed to description - krzk 
- Accending order of dt-binding required list - krzk
- Added dt-binding item power-domain-name - Bryan
- Reformat dt-binding example - krzk
- Move reg as 2nd property - krzk
- Move reg-names as 3nd property - krzk
- Reduce iommus maxItems to 3 - rob's bot
- Reduce clocks maxItems to 24 - rob's bot
- Combine patch #2 and #3 - krzk and Bryan
- Split eror-print log for clk name from #5 - Konrad
- Reformat dt-node - krzk
- Corrected phy init sequence for v1.2.2 - Bryan
- Added 3 more debug info for missing clk and low clk-rate issue.
- Adding port info to ports sub-node
- Adding required-opps node to dt
- Link to v1: https://lore.kernel.org/r/[email protected]

--- b4-submit-tracking ---
# This section is used internally by b4 prep for tracking purposes.
{
  "series": {
    "revision": 3,
    "change-id": "20240621-b4-sc7180-camss-cddc6b60a9b4",
    "prefixes": [
      "RFT"
    ],
    "history": {
      "v1": [
        "[email protected]"
      ],
      "v2": [
        "[email protected]"
      ]
    }
  }
}