83a092cf95f28: powerpc: Link warning for orphan sections

Hi Nick,

I am building my kernel (ppc32) with both
CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y and CONFIG_UBSAN=y. This leads
to ~316428 warnings such as:

+ powerpc-linux-gnu-ld -EB -m elf32ppc -Bstatic --orphan-handling=warn
--build-id --gc-sections -X -o .tmp_vmlinux1 -T
./arch/powerpc/kernel/vmlinux.lds --who
le-archive built-in.a --no-whole-archive --start-group lib/lib.a --end-group
powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_data393'
from `init/main.o' being placed in section `.data..Lubsan_data393'.
powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_data394'
from `init/main.o' being placed in section `.data..Lubsan_data394'.
powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_data395'
from `init/main.o' being placed in section `.data..Lubsan_data395'.
powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_data396'
from `init/main.o' being placed in section `.data..Lubsan_data396'.
...

What would you recommend to reduce the number of warnings produced ? I
tried `--warn-once` but that only affect undefined symbols.

Thanks