iwlwifi: bump FW API to 51 for 22000 series

Start supporting API version 51 for 22000 series.
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/intel/iwlwifi/cfg/22000.c

@@ -57,7 +57,7 @@
 #include "iwl-prph.h"
 
 /* Highest firmware API version supported */
-#define IWL_22000_UCODE_API_MAX	50
+#define IWL_22000_UCODE_API_MAX	51
 
 /* Lowest firmware API version supported */
 #define IWL_22000_UCODE_API_MIN	39