py/mperrno: Add EAFNOSUPPORT definition.

py/mperrno.h

@@ -66,6 +66,7 @@
 #define MP_EPIPE             (32) // Broken pipe
 #define MP_EDOM              (33) // Math argument out of domain of func
 #define MP_ERANGE            (34) // Math result not representable
+#define MP_EAFNOSUPPORT      (97) // Address family not supported by protocol
 #define MP_ENOTCONN         (107) // Transport endpoint is not connected
 #define MP_ETIMEDOUT        (110) // Connection timed out
 
@@ -109,6 +110,7 @@
 #define MP_EPIPE            EPIPE
 #define MP_EDOM             EDOM
 #define MP_ERANGE           ERANGE
+#define MP_EAFNOSUPPORT     EAFNOSUPPORT
 #define MP_ENOTCONN         ENOTCONN
 #define MP_ETIMEDOUT        ETIMEDOUT