fix socket.h on mips

why does mips have to be gratuitously incompatible in every possible
imaginable way?
diff --git a/arch/mips/bits/socket.h b/arch/mips/bits/socket.h
index 36febbc..3715ddd 100644
--- a/arch/mips/bits/socket.h
+++ b/arch/mips/bits/socket.h
@@ -15,3 +15,6 @@
 	int cmsg_level;
 	int cmsg_type;
 };
+
+#define SOCK_STREAM    2
+#define SOCK_DGRAM     1
diff --git a/include/sys/socket.h b/include/sys/socket.h
index 88243ae..a384ca1 100644
--- a/include/sys/socket.h
+++ b/include/sys/socket.h
@@ -34,8 +34,11 @@
 #define SHUT_WD 1
 #define SHUT_RDWR 2
 
+#ifndef SOCK_STREAM
 #define SOCK_STREAM    1
 #define SOCK_DGRAM     2
+#endif
+
 #define SOCK_RAW       3
 #define SOCK_RDM       4
 #define SOCK_SEQPACKET 5