DataFlash : Change to more descriptive EKF logging names

libraries/DataFlash/DataFlash.h

@@ -297,9 +297,9 @@ struct PACKED log_EKF1 {
 struct PACKED log_EKF2 {
     LOG_PACKET_HEADER;
     uint32_t time_ms;
-    int8_t accX;
-    int8_t accY;
-    int8_t accZ;
+    int8_t Ratio;
+    int8_t AZ1bias;
+    int8_t AZ2bias;
     int16_t windN;
     int16_t windE;
     int16_t magN;
@@ -462,7 +462,7 @@ struct PACKED log_Ubx2 {
     { LOG_EKF1_MSG, sizeof(log_EKF1), \
       "EKF1","IccCffffffccc","TimeMS,Roll,Pitch,Yaw,VN,VE,VD,PN,PE,PD,GX,GY,GZ" }, \
     { LOG_EKF2_MSG, sizeof(log_EKF2), \
-      "EKF2","Ibbbcchhhhhh","TimeMS,AX,AY,AZ,VWN,VWE,MN,ME,MD,MX,MY,MZ" }, \
+      "EKF2","Ibbbcchhhhhh","TimeMS,Ratio,AZ1bias,AZ2bias,VWN,VWE,MN,ME,MD,MX,MY,MZ" }, \
     { LOG_EKF3_MSG, sizeof(log_EKF3), \
       "EKF3","Icccccchhhc","TimeMS,IVN,IVE,IVD,IPN,IPE,IPD,IMX,IMY,IMZ,IVT" }, \
     { LOG_EKF4_MSG, sizeof(log_EKF4), \

libraries/DataFlash/LogFile.cpp

@@ -927,9 +927,9 @@ void DataFlash_Class::Log_Write_EKF(AP_AHRS_NavEKF &ahrs)
     struct log_EKF2 pkt2 = {
         LOG_PACKET_HEADER_INIT(LOG_EKF2_MSG),
         time_ms : hal.scheduler->millis(),
-        accX    : (int8_t)(100*accelBias.x),
-        accY    : (int8_t)(100*accelBias.y),
-        accZ    : (int8_t)(100*accelBias.z),
+        Ratio   : (int8_t)(100*accelBias.x),
+        AZ1bias : (int8_t)(100*accelBias.z),
+        AZ2bias : (int8_t)(100*accelBias.y),
         windN   : (int16_t)(100*wind.x),
         windE   : (int16_t)(100*wind.y),
         magN    : (int16_t)(magNED.x),