Make internal floppy disk controller the default

src/floppy/fdc.c

@@ -77,7 +77,7 @@ int         lastbyte = 0;
 int floppymodified[4];
 int floppyrate[4];
 
-int fdc_current[FDC_MAX] = { 0, 0 };
+int fdc_current[FDC_MAX] = { FDC_INTERNAL, 0 };
 
 volatile int fdcinited = 0;
 
@@ -2882,4 +2882,4 @@ const device_t fdc_ps2_mca_device = {
     .speed_changed = NULL,
     .force_redraw  = NULL,
     .config        = NULL
-};
+};