Add new error code PLATFORM_ALLOC_FAILED for mbedtls_platform_memmove()

Signed-off-by: Piotr Nowicki <piotr.nowicki@arm.com>
diff --git a/include/mbedtls/error.h b/include/mbedtls/error.h
index a52f9f5..9696f17 100644
--- a/include/mbedtls/error.h
+++ b/include/mbedtls/error.h
@@ -86,7 +86,7 @@
  * CHACHA20  3                  0x0051-0x0055
  * POLY1305  3                  0x0057-0x005B
  * CHACHAPOLY 2 0x0054-0x0056
- * PLATFORM  3  0x0070-0x0072   0x0071-0x0071
+ * PLATFORM  4  0x0070-0x0072   0x0071-0x0071 0x0076-0x0076
  *
  * High-level module nr (3 bits - 0x0...-0x7...)
  * Name      ID  Nr of Errors