Fix usage of Iris mixer, make space by deleting unused files

ROMFS/px4fmu_common/init.d/10016_3dr_iris

@@ -29,6 +29,6 @@ then
 	param set BAT_A_PER_V 15.39103
 fi
 
-set MIXER quad_w
+set MIXER dc
 
 set PWM_OUT 1234

ROMFS/px4fmu_common/init.d/rcS

@@ -4,6 +4,24 @@
 #
 #  NOTE: COMMENT LINES ARE REMOVED BEFORE STORED IN ROMFS.
 #
+# UART mapping on FMUv1/2/3/4:
+#
+# UART1			/dev/ttyS0		IO debug
+# USART2		/dev/ttyS1		TELEM1 (flow control)
+# USART3		/dev/ttyS2		TELEM2 (flow control)
+# UART4
+# UART
+#
+#
+# UART mapping on FMUv5:
+#
+# UART1			/dev/ttyS0		GPS
+# USART2		/dev/ttyS1		TELEM1 (flow control)
+# USART3		/dev/ttyS2		TELEM2 (flow control)
+# UART4			/dev/ttyS3		?
+# USART6		/dev/ttyS4		TELEM3 (flow control)
+# UART7			/dev/ttyS5		?
+# UART8			/dev/ttyS6		CONSOLE
 
 #
 # Start CDC/ACM serial driver
@@ -792,7 +810,7 @@ then
 			then
 				set MAV_TYPE 2
 			fi
-			if [ $MIXER == quad_w -o $MIXER == sk450_deadcat ]
+			if [ $MIXER == quad_w -o $MIXER == quad_dc ]
 			then
 				set MAV_TYPE 2
 			fi

ROMFS/px4fmu_common/mixers/quad_dc.main.mix

+Multirotor mixer
+===========================
+
+This file defines a single mixer for a quadrotor in DC wide arms configuration.  All controls are mixed 100%.
+
+R: 4dc 10000 10000 10000 0

ROMFS/px4fmu_common/mixers/sk450_deadcat.aux.mix

-Gimbal / payload mixer for PX4FMU
-===========================
-
-Configuration with 2 gimbals:
- - 2 axes inline GoPro gimbal (pitch, roll)
- - 2 axes FPV gimbal (pitch, yaw), physically attached GoPro gimbal's roll stabilization
------------------------------------------------------
-
-# gimbal roll
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 2 0  -11500  -10000  900 -10000  10000
-
-# gimbal pitch
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 2 1  12000  12000   2000 -10000  10000
-
-# FPV gimbal yaw (not implemented, yet)
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 2 2  10000  10000      0 -10000  10000
-
-# FPV gimbal pitch
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 2 1  -12000  -12000 -3000 -10000  10000
-
-# reserved, not used
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 2 4  10000  10000      0 -10000  10000
-
-# parachute
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 2 7  10000  10000      0 -10000  10000
-

ROMFS/px4fmu_common/mixers/sk450_deadcat.main.mix

-Multirotor mixer for PX4IO
-===========================
-
-This file defines a single mixer for a quadrotor in SK450 DeadCat configuration.  All controls are mixed 100%.
-
-R: 4dc 10000 10000 10000 0
-
-Gimbal / payload mixer for last three channels
------------------------------------------------------
-
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 3 5  10000  10000      0 -10000  10000
-
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 3 6  10000  10000      0 -10000  10000
-
-M: 1
-O:      10000  10000      0 -10000  10000
-S: 3 7  10000  10000      0 -10000  10000