Various cross-platform fixes

Improve compilation with libpayload (compiling flashrom.c and
linking is still broken):
 - disable Ponyprog (which enforced serial.c compilation)
 - make errno available where it is needed

Fix internal.c for non-x86 and enable cb parsing on ARM.

Fix mingw builds by using its __USE_MINGW_ANSI_STDIO macro
and gnu_printf definition for printf format style checking.
See http://sourceforge.net/apps/trac/mingw-w64/wiki/gnu%20printf
This requires inclusion of stdio.h in flash.h.

Fix order of libraries in the Makefile:
FEATURE_LIBS needs to come *after* PCILIBS in case ZLIB is needed by it.

Corresponding to flashrom svn r1697.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/hwaccess.c b/hwaccess.c
index 8a4a50a..5b18c32 100644
--- a/hwaccess.c
+++ b/hwaccess.c
@@ -35,14 +35,13 @@
 #include <stdint.h>
 #include <string.h>
 #include <stdlib.h>
+#include <errno.h>
 #include <sys/types.h>
 #if !defined (__DJGPP__) && !defined(__LIBPAYLOAD__)
+/* No file access needed/possible to get hardware access permissions. */
 #include <unistd.h>
 #include <fcntl.h>
 #endif
-#if !defined (__DJGPP__)
-#include <errno.h>
-#endif
 #include "flash.h"
 #include "hwaccess.h"