Update WHD to v1.50

Author: cy-opm

targets/TARGET_Cypress/TARGET_PSOC6/COMPONENT_WHD/generated_mac_address.txt

@@ -6,4 +6,4 @@
  * MAC address is printed during WHD power up
  */
 
-#define NVRAM_GENERATED_MAC_ADDRESS        "macaddr=00:A0:50:bb:5c:af"
+#define NVRAM_GENERATED_MAC_ADDRESS        "macaddr=00:A0:50:13:e1:5d"

targets/TARGET_Cypress/TARGET_PSOC6/COMPONENT_WHD/inc/whd_types.h

@@ -118,7 +118,9 @@ typedef struct wl_af_params whd_af_params_t;
 /**
  * The maximum size in bytes of the data part of an Ethernet frame
  */
+#ifndef WHD_PAYLOAD_MTU
 #define WHD_PAYLOAD_MTU           (1500)
+#endif
 
 /**
  * The maximum size in bytes of a packet used within whd.

targets/TARGET_Cypress/TARGET_PSOC6/COMPONENT_WHD/inc/whd_version.h

@@ -1,3 +1,3 @@
-#define WHD_VERSION "v1.40.0"
-#define WHD_BRANCH "v1.40.0"
-#define WHD_DATE "2019-10-02 13:25:35 +0800"
+#define WHD_VERSION "v1.50.0-rc1"
+#define WHD_BRANCH "v1.50.0-rc1"
+#define WHD_DATE "2019-10-30 18:42:31 +0530"