Merge tag 'thead-clk-for-v6.20' of https://git.kernel.org/pub/scm/linux/kernel/git/fustini/linux into clk-thead

Pull T-HEAD clock driver updates from Drew Fustini:

There is just one set of changes for thead this cycle. They add support
for CPU scaling on the T-HEAD TH1520 by allowing the PLL rate used for
the CPU cluster to be reconfigured. The changes have been tested in
linux-next.

Signed-off-by: Drew Fustini <fustini@kernel.org>

* tag 'thead-clk-for-v6.20' of https://git.kernel.org/pub/scm/linux/kernel/git/fustini/linux:
  clk: thead: th1520-ap: Support CPU frequency scaling
  clk: thead: th1520-ap: Add macro to define multiplexers with flags
  clk: thead: th1520-ap: Support setting PLL rates
  clk: thead: th1520-ap: Add C910 bus clock
  clk: thead: th1520-ap: Poll for PLL lock and wait for stability
  dt-bindings: clock: thead,th1520-clk-ap: Add ID for C910 bus clock

Author: bebarino