fix spelling errors detected by lintian

Change-Id: I381618eb55cc513cfa9c2e384c27cead0935c8bf
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index bc712fd..da85df4 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -650,7 +650,7 @@
 		rc = pcu_rx_susp_req(&pcu_prim->u.susp_req);
 		break;
 	default:
-		LOGP(DL1IF, LOGL_ERROR, "Received unknwon PCU msg type %d\n",
+		LOGP(DL1IF, LOGL_ERROR, "Received unknown PCU msg type %d\n",
 			msg_type);
 		rc = -EINVAL;
 	}