arm64: dts: ti: k3-am62x-phyboard-lyra: Add HDMI bridge regulators

arm64: dts: ti: k3-am62x-phyboard-lyra: Add HDMI bridge regulators

Specify I/0 voltage & core supply regulators used by the SII902x
HDMI bridge and make them known to the bridge.
This resolves the following warning:

  sii902x 1-0039: supply iovcc not found, using dummy regulator
  sii902x 1-0039: supply cvcc12 not found, using dummy regulator

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Link: https://lore.kernel.org/r/20241101131427.3815341-2-w.egorov@phytec.de
Signed-off-by: Nishanth Menon <nm@ti.com>