generic: Move simulator/irq.h to new file generic/irq.h

Move the generic irq definitions into generic/irq.h and move the
simulator irq code into main.c.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

src/generic/pgm.h

@@ -0,0 +1,13 @@
+#ifndef __GENERIC_PGM_H
+#define __GENERIC_PGM_H
+// This header provides wrappers for the AVR specific "PROGMEM"
+// declarations on non-avr platforms.
+
+#define PROGMEM
+#define PSTR(S) S
+#define READP(VAR) VAR
+#define vsnprintf_P(D, S, F, A) vsnprintf(D, S, F, A)
+#define strcasecmp_P(S1, S2) strcasecmp(S1, S2)
+#define memcpy_P(DST, SRC, SIZE) memcpy((DST), (SRC), (SIZE))
+
+#endif // pgm.h