misdn: Build the userspace library
Apply a local patch to increase the the buffer size, on different
platforms the kernel structs have holes that this calculation did
not account for.
diff --git a/recipes-isdn/misdn/files/misdn-ph-size.diff b/recipes-isdn/misdn/files/misdn-ph-size.diff
new file mode 100644
index 0000000..98bf866
--- /dev/null
+++ b/recipes-isdn/misdn/files/misdn-ph-size.diff
@@ -0,0 +1,13 @@
+diff --git a/include/mISDN/mbuffer.h b/include/mISDN/mbuffer.h
+index 5e3dc96..8e6ed52 100644
+--- a/include/mISDN/mbuffer.h
++++ b/include/mISDN/mbuffer.h
+@@ -54,7 +54,7 @@ struct mbuffer {
+ struct l3_msg l3;
+ } __attribute__((__may_alias__));
+
+-#define MBUFFER_DATA_SIZE 280
++#define MBUFFER_DATA_SIZE 400
+
+ /*
+ * init mbuffer caching