Restructure: Move fsk from common code to 'libfsk'

src/r2000/Makefile.am

@@ -19,6 +19,7 @@ radiocom2000_LDADD = \
 	$(top_builddir)/src/libtimer/libtimer.a \
 	$(top_builddir)/src/libsamplerate/libsamplerate.a \
 	$(top_builddir)/src/libemphasis/libemphasis.a \
+	$(top_builddir)/src/libfsk/libfsk.a \
 	$(top_builddir)/src/libfm/libfm.a \
 	$(top_builddir)/src/libfilter/libfilter.a \
 	$(top_builddir)/src/libwave/libwave.a \

src/r2000/r2000.h

@@ -2,7 +2,7 @@
 #include "../libtimer/timer.h"
 #include "../common/sender.h"
 #include "../common/call.h"
-#include "../common/fsk.h"
+#include "../libfsk/fsk.h"
 
 enum dsp_mode {
 	DSP_MODE_OFF,		/* no transmission */