extmod/machine_i2c: Implement I2C memory reading/writing.
diff --git a/py/qstrdefs.h b/py/qstrdefs.h
index a2717d2..da22a40 100644
--- a/py/qstrdefs.h
+++ b/py/qstrdefs.h
@@ -699,6 +699,10 @@
 Q(readfrom_mem)
 Q(readfrom_mem_into)
 Q(writeto_mem)
+Q(addr)
+Q(memaddr)
+Q(n)
+Q(buf)
 #endif
 
 #if MICROPY_PY_USSL