ntb: ntb_hw_switchtec: Increase MAX_MWS limit to 256

Microchip NTB switchtec devices supports up to 512 LUT's across all
NT partitions. This patch enable symmetric NTB configuration to utilize
all 512 memory windows across 2 peers partitions.

Signed-off-by: Maciej Grochowski <Maciej.Grochowski@sony.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

Author: Maciej Grochowski

drivers/ntb/hw/mscc/ntb_hw_switchtec.c

@@ -29,7 +29,7 @@ MODULE_PARM_DESC(use_lut_mws,
 		 "Enable the use of the LUT based memory windows");
 
 #define SWITCHTEC_NTB_MAGIC 0x45CC0001
-#define MAX_MWS     128
+#define MAX_MWS     256
 
 struct shared_mw {
 	u32 magic;