net/9p/protocol.c: Fix a memory leak

When p9pdu_readf() is called with "s" attribute, it allocates a pointer that
will store a string. In p9dirent_read(), this pointer is not being released,
leading to out of memory errors.
This patch releases this pointer after string is copyed to dirent->d_name.

Signed-off-by: Pedro Scarapicchia Junior <pedro.scarapiccha@br.flextronics.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index b58a501..a873277 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -674,6 +674,7 @@
 	}
 
 	strcpy(dirent->d_name, nameptr);
+	kfree(nameptr);
 
 out:
 	return fake_pdu.offset;