GBE: new Load/Store Instruction Selection pattern
GBE: new Load/Store Instruction Selection pattern

This patch add support for stateless load/store in instruction selection.
Because stateless message now only support 64bit address (A64) and SIMD8
mode. So we have to handle SIMD16 split and A32/A64 convert.

Signed-off-by: Ruiling Song <286a174c1339c6eff91abc41c3a1012c95030c95@intel.com>
Reviewed-by: Yang Rong <78759e37dc7114caed18f74e7515c5cb519dbf6d@intel.com>

wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet