introduced .MCU makefile variable so we can remove .ARCH later which is only used to set the MCU type for the compiler. .MCU is now only used for AVRs as for the others it is set in the makefiles (e.g. Makefile.arm7, Makefile.stm32, etc.)

conf/airframes/Poine/antenna.xml

@@ -10,7 +10,7 @@
 
 ARCHI=avr
 ant.ARCHDIR = $(ARCHI)
-ant.ARCH = atmega128
+ant.MCU = atmega128
 
 
 # 16MHz resonator

conf/airframes/Poine/bl_mc.xml

@@ -6,7 +6,7 @@
 ARCHI=avr
 
 main.ARCHDIR=$(ARCHI)
-main.ARCH = atmega128
+main.MCU = atmega128
 
 # internal RC 8MHz
 LOW_FUSE  = e4
@@ -44,4 +44,4 @@ main.srcs += $(SRC_ARCH)/bl_mc_pwm.c
 
 </makefile>
 
-</airframe>
+</airframe>