COMPMID-3434 Add SIMD support in gemmlowp_mm_native

COMPMID-3434 Add SIMD support in gemmlowp_mm_native

* Add SIMD support in gemmlowp_mm_native for Midgard arch
* Extend the validation test to include the corner case of m0=1, n0=1 and
  k0=1

Change-Id: I1f5e384b206a20e974932b8aa10cd628c69e5efc
Signed-off-by: SiCong Li <sicong.li@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3142
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>