stdlib: Refactor the ArmBoard for _connect_things move

Since moving `_connect_things` to a pre-init step, the ArmBoard can now
be refactored to set up things in a more logical manner. In particular,
this patch moves activity out of the `_add_disk_to_board` function and
into the `_pre_initialization` function.

Change-Id: I5d40267f28ae87cd483a0396739c09b8b2b46383
Tested-by: kokoro <>
Reviewed-by: Bobby Bruce <>
Maintainer: Bobby Bruce <>
1 file changed