fix(libc): pri*ptr macros for aarch64

This fix solves problems with using PRI*PTR on aarch64 like so:
error: format '%x' expects argument of type 'unsigned int', but
argument 3 has type 'uintptr_t' {aka 'long unsigned int'}

Change-Id: I135d3e5cea5459f138b20331b5e9472e2e9e566c
Signed-off-by: K <kayo@illumium.org>
diff --git a/include/lib/libc/aarch64/inttypes_.h b/include/lib/libc/aarch64/inttypes_.h
index 197d627..f25882f 100644
--- a/include/lib/libc/aarch64/inttypes_.h
+++ b/include/lib/libc/aarch64/inttypes_.h
@@ -18,4 +18,11 @@
 #define PRIx64		"lx"	/* uint64_t */
 #define PRIX64		"lX"	/* uint64_t */
 
+#define PRIdPTR         "ld"    /* intptr_t */
+#define PRIiPTR         "li"    /* intptr_t */
+#define PRIoPTR         "lo"    /* intptr_t */
+#define PRIuPTR         "lu"    /* uintptr_t */
+#define PRIxPTR         "lx"    /* uintptr_t */
+#define PRIXPTR         "lX"    /* uintptr_t */
+
 #endif /* INTTYPES__H */