osmo_io: Use LOGPIO instead of LOGP

Change-Id: I4ee256b18544f7ca6bff6b7c6ebcce15546bb1f2
diff --git a/src/core/osmo_io_poll.c b/src/core/osmo_io_poll.c
index c4819fa..571f2bb 100644
--- a/src/core/osmo_io_poll.c
+++ b/src/core/osmo_io_poll.c
@@ -51,7 +51,7 @@
 		struct iofd_msghdr hdr;
 		msg = iofd_msgb_pending_or_alloc(iofd);
 		if (!msg) {
-			LOGP(DLIO, LOGL_ERROR, "iofd(%s): Could not get msgb for reading\n", iofd->name);
+			LOGPIO(iofd, LOGL_ERROR, "Could not allocate msgb for reading\n");
 			OSMO_ASSERT(0);
 		}