armv8/lsch3/config: Define CONFIG_SYS_CACHELINE_SIZE for LS2085A

Define CONFIG_SYS_CACHELINE_SIZE for LS2085A which is required by
USB XHCI stack for alignment

Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>