Revert "zephyr: brya: Convert HOOK_INIT to SYS_INIT"
Revert "zephyr: brya: Convert HOOK_INIT to SYS_INIT"

This reverts commit 5a66d11d0f0170752805223642a627904ba52573.

Reason for revert: b:227661993: EFS2 broken after SYS_INIT changes

Original change's description:
> zephyr: brya: Convert HOOK_INIT to SYS_INIT
>
> Convert HOOK_INIT to the equivalent SYS_INIT call.
>
> BUG=b:226434387
> BRANCH=none
> TEST=zmake testall
>
> Signed-off-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>
> Change-Id: If4a3dca9c8ec920946589c717599d3db51838cf1
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3553842
> Reviewed-by: Abe Levkoy <alevkoy@chromium.org>

Bug: b:226434387
Change-Id: Ic90758256b86f021fbb3d7e1652c8daf9fb41eda
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3564617
Tested-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>
Reviewed-by: Wai-Hong Tam <04b587fdf5845741a0c5a8b9cd59ca72d73ef8fc@google.com>
Commit-Queue: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec