changes:
- under boards/risc-v/k230/canmv230/scripts/:
- Make.defs add POSTBUILD actions
- ld-flat.script minor reformating
- ld-kernel.script minor reformating
- under boards/risc-v/k230/canmv230/src/:
- Makefile add clean of generated ROMFS source
- canmv_init.c use `ferr` and drop too late runtime warning
- romfs_stub.c use const for romfs_img_len
The POSTBULD actions can warn stub ROMFS usage at build time, thus
the too late warning in canmv_init.c can be removed.
The cleaning of `libboard.a` in POSTBUILD can also ensure real ROMFS
is in use, as some times weak_data is still in use.
Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
b516b29efc