GBE: support load/store of char/short vector.
GBE: support load/store of char/short vector.

We just load/store those vector elements one by one.

Signed-off-by: Zhigang Gong <e04a7b9b70b1e4c6318cf117dcd1a9056e14b97a@linux.intel.com>
Tested-by: Lv, Meng <2df664ee4255226675c7b29e26307ac8da3842dc@intel.com>
Reviewed-by: Yang Rong <78759e37dc7114caed18f74e7515c5cb519dbf6d@intel.com>

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