Remove usage of kernel headers, deprecated since linux-headers-2.6.18.
Patch by Shunichi Fuji <palgowr@gmail.com>.

See bug #156306

--- a/fbdpsp.c
+++ b/fbdpsp.c
@@ -827,8 +827,7 @@
 
 #ifdef JFB_VGA16FB
 
-#include <asm/io.h>
-#include <asm/system.h>
+#include <sys/io.h>
 
 #define GRAPHICS_ADDR_REG 0x3ce         /* Graphics address register. */
 #define GRAPHICS_DATA_REG 0x3cf         /* Graphics data register. */