SIMINFO: fetch device name from Makefile / compile parameters.

It's also possible to do this by stringifying MCU, but this
requires double redirection, which isn't easily readable in a .c
file. For stringification, see the bottom example at
https://gcc.gnu.org/onlinedocs/cpp/Stringification.html

Makefile-AVR

@@ -114,6 +114,7 @@ TARGET = $(PROGRAM).hex
 SOURCES = $(wildcard *.c)
 
 CFLAGS += -DF_CPU=$(F_CPU)
+CFLAGS += -DMCU_STR=\"$(MCU)\"
 CFLAGS += -mmcu=$(MCU)
 CFLAGS += -g
 CFLAGS += -Wall

mendel.c

@@ -52,7 +52,7 @@
 
 #ifdef SIMINFO
   #include "../simulavr/src/simulavr_info.h"
-  SIMINFO_DEVICE("atmega644");
+  SIMINFO_DEVICE(MCU_STR);
   SIMINFO_CPUFREQUENCY(F_CPU);
   SIMINFO_SERIAL_IN("D0", "-", BAUD);
   SIMINFO_SERIAL_OUT("D1", "-", BAUD);