ARC: hs6x: gcc-m-cpu: update mcpu to be aligned with new toolchain

New ARCv3 GNU toolchain uses hs6x mcpu value for hs6x CPUs, the older
one allows to use any mcpu value.

Update old 'arc64' mcpu to 'hs6x' to be aligned with new toolchain

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Evgeniy Paltsev <PaltsevEvgeniy@gmail.com>
1 file changed