Kill unneeded #include wherever possible

Tested on Linux, FreeBSD, NetBSD, OpenBSD, DOS.
Thanks to Jonathan A. Kollasch and Idwer Vollering for testing.

Corresponding to flashrom svn r1057.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Idwer Vollering <vidwer+lists.flashrom@gmail.com>

physmap.c

@@ -23,13 +23,17 @@
 #include <unistd.h>
 #include <stdio.h>
 #include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
 #include "flash.h"
 
+/* Do we need any file access or ioctl for physmap or MSR? */
+#if !defined(__DJGPP__)
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#endif
+
 #ifdef __DJGPP__
 #include <dpmi.h>
 #include <sys/nearptr.h>