scripts: build: gen_handles: use Z_DECL_ALIGN

Instead of hardcoding alignment size for pass 2 device handles, use
Z_DECL_ALIGN. This makes sure gen_handles.py is always in sync with the
type defined in device.h. The build assert in device.h can be removed as
a result, since we do not hardcode handles size anywhere else.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
2 files changed