Add ID, VD & Comp meter cals for FT991

Power level should return 0 when power is 0

rigs/yaesu/ft991.c

@@ -185,6 +185,9 @@ const struct rig_caps ft991_caps =
     .chan_desc_sz =       0,
     .rfpower_meter_cal =  FT991_RFPOWER_METER_CAL,
     .str_cal =            FT991_STR_CAL,
+    .id_meter_cal =       FT991_ID_CAL,
+    .vd_meter_cal =       FT991_VD_CAL,
+    .comp_meter_cal =     FT991_COMP_CAL,
     .chan_list =          {
         {   1,  99, RIG_MTYPE_MEM,  NEWCAT_MEM_CAP },
         { 100, 117, RIG_MTYPE_EDGE, NEWCAT_MEM_CAP },    /* two by two */

rigs/yaesu/ft991.h

@@ -75,8 +75,9 @@
 // Borrowed from FLRig -- Thanks to Dave W1HKJ
 #define FT991_RFPOWER_METER_CAL \
     { \
-        6, \
+        7, \
         { \
+            {0, 0.0f}, \
             {10, 0.8f}, \
             {50, 8.0f}, \
             {100, 26.0f}, \
@@ -108,6 +109,40 @@
         } }
 
 
+#define FT991_ID_CAL { 7, \
+    { \
+        {   0, 0.0f }, \
+        {  53, 5.0f }, \
+        {  65, 6.0f }, \
+        {  78, 7.0f }, \
+        {  86, 8.0f }, \
+        {  98, 9.0f }, \
+        { 107, 10.0f } \
+    } \
+}
+
+#define FT991_VD_CAL { 3, \
+    { \
+        {   0, 0.0f  }, \
+        { 189, 13.6f }, \
+        { 192, 13.8f }, \
+    } \
+}
+
+#define FT991_COMP_CAL { 9, \
+    { \
+        { 0,   0.0f  }, \
+        { 40,  2.5f  }, \
+        { 60,  5.0f  }, \
+        { 85,  7.5f  }, \
+        { 135, 10.0f }, \
+        { 150, 12.5f }, \
+        { 175, 15.0f }, \
+        { 195, 17.5f }, \
+        { 220, 20.0f } \
+    } \
+}
+
 /*
  * Other features (used by rig_caps)
  *