Add support for building flashrom against libpayload

This doesn't include changes to the frontend which must be
done separately, so this won't work out of the box.
This code was tested on hardware.

Corresponding to flashrom svn r1184.

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

udelay.c

@@ -19,6 +19,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#ifndef __LIBPAYLOAD__
+
 #include <unistd.h>
 #include <sys/time.h>
 #include <stdlib.h>
@@ -179,3 +181,15 @@ void internal_delay(int usecs)
 	}
 }
 
+#else 
+
+void myusec_calibrate_delay(void)
+{
+	get_cpu_speed();
+}
+
+void internal_delay(int usecs)
+{
+	udelay(usecs);
+}
+#endif