libpayload: Some more compatibility (for flashrom)

libpci defines an arbitrary set of PCI vendor IDs, flashrom uses the
Intel definition. Add it.

flashrom also requires inttypes.h, so add the OpenBSD version

Change-Id: I9bffd8193f635c375ac4d6b6eae8d3d876b95f5f
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/154
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

payloads/libpayload/include/stdlib.h

@@ -120,6 +120,7 @@ void *memalign(size_t align, size_t size);
  */
 long int strtol(const char *s, char **nptr, int base);
 unsigned long int strtoul(const char *s, char **nptr, int base);
+unsigned long long int strtoull(const char *s, char **nptr, int base);
 long atol(const char *nptr);
 
 /** @} */