Merge tag 'thead-dt-for-v6.14' of https://github.com/pdp7/linux into soc/dt

thead-dt-for-v6.14: T-HEAD Devicetrees for v6.14

Add mailbox node for the T-Head TH1520 RISC-V SoC. The mailbox bindings
and driver were already merged in v6.13:

b2cf36e4a2ac ("dt-bindings: mailbox: Add thead,th1520-mailbox bindings")
5d4d263e1c6b ("mailbox: Introduce support for T-head TH1520 Mailbox driver")

Signed-off-by: Drew Fustini <drew@pdp7.com>
* tag 'thead-dt-for-v6.14' of https://github.com/pdp7/linux:
  riscv: dts: thead: Add mailbox node