- Turns out GCC 11 is overly aggressive in removing symbols it can't
   identify as being used (weak symbols maybe???). Mark all syscalls as
   being used to prevent GCC from removing them with/while/during LTO.
 - Change the directory name of the example project to match project
   name.

 - Split up e-ink init from poweron and destroy from poweroff
 - Disable/stop using the LED for blinking, as it turns out the darn
   thing is also connected to the SCK pin