fpu: move public header file to include/fpu

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/target-m68k/cpu.h b/target-m68k/cpu.h
index b37af1f..adaf56c 100644
--- a/target-m68k/cpu.h
+++ b/target-m68k/cpu.h
@@ -28,7 +28,7 @@
 #include "qemu-common.h"
 #include "exec/cpu-defs.h"
 
-#include "softfloat.h"
+#include "fpu/softfloat.h"
 
 #define MAX_QREGS 32