include, lib: Add <inttypes.h> printf macros

In general, third party code (such as vboot) doesn't know what the
underlying types are for the integers in <stdint.h>, so these macros are
useful for portably printing them. Of these definitions, coreboot so far
has only used PRIu64 (in one place), which isn't needed anymore since we
know what the underlying type of a u64 is.

Change-Id: I9e3a300f9b1c38e4831b030ff8af3fed2fa60f14
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33823
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/include/stdint.h

@@ -110,10 +110,4 @@ typedef _Bool   bool;
 #define true    1
 #define false   0
 
-/* TODO: move into inttypes.h */
-#ifndef __ROMCC__
-#define PRIu64  "llu"
-#define PRIxPTR "lx"
-#endif
-
 #endif /* STDINT_H */