Cleaned up excess header includes from the chipset files and the ALI M1487/1489 is now correctly implemented (still Dev branched as I have not committed the machine files yet).

src/chipset/headland.c

@@ -31,9 +31,7 @@
 #include <86box/timer.h>
 #include <86box/io.h>
 #include <86box/mem.h>
-#include <86box/rom.h>
 #include <86box/device.h>
-#include <86box/keyboard.h>
 #include <86box/fdd.h>
 #include <86box/fdc.h>
 #include <86box/port_92.h>
@@ -63,8 +61,6 @@ typedef struct headland_t {
     headland_mr_t	null_mr,
 			ems_mr[64];
 
-    rom_t		vid_bios;
-
     mem_mapping_t	low_mapping;
     mem_mapping_t	ems_mapping[64];
     mem_mapping_t	mid_mapping;