Reducing VFR and HUD update rates, we do not need 100 Hz for 30 Hz human vision

ROMFS/px4fmu_common/init.d/rc.usb

@@ -9,6 +9,8 @@ mavlink start -r 10000 -d /dev/ttyACM0
 # Enable a number of interesting streams we want via USB
 mavlink stream -d /dev/ttyACM0 -s NAMED_VALUE_FLOAT -r 10
 mavlink stream -d /dev/ttyACM0 -s OPTICAL_FLOW -r 10
+mavlink stream -d /dev/ttyACM0 -s VFR_HUD -r 20
+mavlink stream -d /dev/ttyACM0 -s ATTITUDE -r 20
 mavlink stream -d /dev/ttyACM0 -s ATTITUDE_CONTROLS -r 30
 mavlink stream -d /dev/ttyACM0 -s SERVO_OUTPUT_RAW_0 -r 10