diag: Add support for sockets

diag does not support logging to sockets. Add support for
new socket logging mode to support sockets.

Change-Id: I1134859825f9e075ee911c94376a239d748e311f
Signed-off-by: Dixon Peterson <dixonp@codeaurora.org>
diff --git a/include/linux/diagchar.h b/include/linux/diagchar.h
index fbffdd2..7769950 100644
--- a/include/linux/diagchar.h
+++ b/include/linux/diagchar.h
@@ -24,6 +24,7 @@
 #define MEMORY_DEVICE_MODE		2
 #define NO_LOGGING_MODE			3
 #define UART_MODE			4
+#define SOCKET_MODE			5
 
 /* different values that go in for diag_data_type */
 #define DATA_TYPE_EVENT         	0