Including associated changes for adding a new scale_sme.cc file.
There is no benefit from an SVE version of this kernel for devices with
an SVE vector length of 128-bits, so skip directly to SME instead. We
do not use the ZA tile here, so this is a purely streaming-SVE (SSVE)
implementation.
Change-Id: I47d149613fbabd8c203605a809811f1a668e8fb7
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5913883
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
Reviewed-by: Justin Green <greenjustin@google.com>
