Pull mailbox updates from Jassi Brar:
 "qcom:
   - enable support for SM8350 and SC7280

  sprd:
   - refcount channel usage
   - specify interrupt names in dt
   - support sc9863a

  arm:
   - drop redundant print

  ti:
   - convert dt-bindings to json schema

  and misc spelling fixes"

* tag 'mailbox-v5.13' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
  dt-bindings: mailbox: qcom-ipcc: Add compatible for SC7280
  dt-bindings: mailbox: ti,secure-proxy: Convert to json schema
  mailbox: arm_mhu_db: Remove redundant dev_err call in mhu_db_probe()
  mailbox: sprd: Add supplementary inbox support
  dt-bindings: mailbox: Add interrupt-names to SPRD mailbox
  mailbox: sprd: Introduce refcnt when clients requests/free channels
  MAINTAINERS: Add DT bindings directory to mailbox
  mailbox: fix various typos in comments
  mailbox: pcc: fix platform_no_drv_owner.cocci warnings
  dt-bindings: mailbox: Add compatible for SM8350 IPCC