Plane: Simplify parameters

Remove a lot of cases where @Values and @Bitmask were encoding the same
information. @Value should only be used with @Bitmask when it is being
used to present a series of reasonable defaults that is some hybrid of
the @Bitmask fields. Enumerating each bit as 1, 2, 4, 8 is of no value.

ArduPlane/Parameters.cpp

@@ -73,7 +73,6 @@ const AP_Param::Info Plane::var_info[] = {
     // @DisplayName: GCS PID tuning mask
     // @Description: bitmask of PIDs to send MAVLink PID_TUNING messages for
     // @User: Advanced
-    // @Values: 0:None,1:Roll,2:Pitch,4:Yaw
     // @Bitmask: 0:Roll,1:Pitch,2:Yaw
     GSCALAR(gcs_pid_mask,           "GCS_PID_MASK",     0),
 
@@ -309,7 +308,6 @@ const AP_Param::Info Plane::var_info[] = {
     // @Param: USE_REV_THRUST
     // @DisplayName: Bitmask for when to allow negative reverse thrust
     // @Description: Typically THR_MIN will be clipped to zero unless reverse thrust is available. Since you may not want negative thrust available at all times this bitmask allows THR_MIN to go below 0 while executing certain auto-mission commands.
-    // @Values: 0:Disabled,1:AlwaysAllowedInAuto,2:Auto_LandApproach,4:Auto_LoiterToAlt,8:Auto_Loiter,16:Auto_Waypoint,32:Loiter,64:RTL,128:Circle,256:Cruise,512:FBWB,1024:Guided
     // @Bitmask: 0:AUTO_ALWAYS,1:AUTO_LAND,2:AUTO_LOITER_TO_ALT,3:AUTO_LOITER_ALL,4:AUTO_WAYPOINTS,5:LOITER,6:RTL,7:CIRCLE,8:CRUISE,9:FBWB,10:GUIDED
     // @User: Advanced
     GSCALAR(use_reverse_thrust,     "USE_REV_THRUST",  USE_REVERSE_THRUST_AUTO_LAND_APPROACH),
@@ -885,7 +883,7 @@ const AP_Param::Info Plane::var_info[] = {
     // @Param: LOG_BITMASK
     // @DisplayName: Log bitmask
     // @Description: Bitmap of what log types to enable in dataflash. This values is made up of the sum of each of the log types you want to be saved on dataflash. On a PX4 or Pixhawk the large storage size of a microSD card means it is usually best just to enable all log types by setting this to 65535. On APM2 the smaller 4 MByte dataflash means you need to be more selective in your logging or you may run out of log space while flying (in which case it will wrap and overwrite the start of the log). The individual bits are ATTITUDE_FAST=1, ATTITUDE_MEDIUM=2, GPS=4, PerformanceMonitoring=8, ControlTuning=16, NavigationTuning=32, Mode=64, IMU=128, Commands=256, Battery=512, Compass=1024, TECS=2048, Camera=4096, RCandServo=8192, Sonar=16384, Arming=32768, FullLogs=65535
-    // @Values: 0:Disabled,5190:APM2-Default,65535:PX4/Pixhawk-Default
+    // @Values: 0:Disabled,65535:PX4/Pixhawk-Default
     // @Bitmask: 0:ATTITUDE_FAST,1:ATTITUDE_MED,2:GPS,3:PM,4:CTUN,5:NTUN,6:MODE,7:IMU,8:CMD,9:CURRENT,10:COMPASS,11:TECS,12:CAMERA,13:RC,14:SONAR,15:ARM/DISARM,19:IMU_RAW
     // @User: Advanced
     GSCALAR(log_bitmask,            "LOG_BITMASK",    DEFAULT_LOG_BITMASK),
@@ -1076,8 +1074,7 @@ const AP_Param::Info Plane::var_info[] = {
 
     // @Param: CRASH_DETECT
     // @DisplayName: Crash Detection
-    // @Description: Automatically detect a crash during AUTO flight and perform the bitmask selected action(s). Disarm will turn off motor for safety and to help against burning out ESC and motor. Setting the mode to manual will help save the servos from burning out by overexerting if the aircraft crashed in an odd orientation such as upsidedown.
-    // @Values: 0:Disabled,1:Disarm
+    // @Description: Automatically detect a crash during AUTO flight and perform the bitmask selected action(s). Disarm will turn off motor for safety and to help against burning out ESC and motor. Setting the mode to manual will help save the servos from burning out by overexerting if the aircraft crashed in an odd orientation such as upsidedown. Set to 0 to disable crash detection.
     // @Bitmask: 0:Disarm
     // @User: Advanced
     GSCALAR(crash_detection_enable,         "CRASH_DETECT",   0),