2024-04-05: 2712: HAT+ fixes for max-current, custom CA cert for net install and...

2024-04-05: 2712: HAT+ fixes for max-current, custom CA cert for net install and enable over-clocking to > 3GHz (latest)

* bootloader: clock_2712: Remove restriction on arm_freq <= 3000
  See: https://github.com/raspberrypi/firmware/issues/1876
* arm_dt: Update max_current to match HAT value
* arm_dt: Remove unused legacy parameters (core_freq, arm_freq, uart0_clkrate and cache_line_size)
* Add support for custom CA cert for network install
    You need to specify
    HTTP_HOST=myhost.com
    HTTP_PATH=/path/to/files
    HTTP_CACERT_HASH=<hash>

    where <hash> is a sha256 hash of the der encoded ca certificate.
    CA cert is added using rpi-eeprom-config.
* Optimise Vbat current draw with charging disabled
* Display OTP boot status in UART log messages.
* Preliminary support for secure-boot OTP provisioning.
* Update PCIE DET_WAKE pinmux for D0 products