remove peekpoke dependency

https://git.debu.gs/gitweb/?p=bmcd;a=commitdiff;h=c5162080995736597e27f638c82718af902e5b00
code, git.debu.gs | 2024-03-13 11:05:10 +0000 GMT | No.1451 
remove peekpoke dependency

peekpoke requires a clang toolchain in order to build.
Use a simple write to /dev/mem instead. which doesnt require any
additional packages.
  • [DH] Cargo.lock
  • [DH] Cargo.toml
  • [DH] src/app/bmc_application.rs
  • [DH] src/hal/power_controller.rs