icnss2: Register for mpss subsys rather than modem subsys

From 5.10 kernel onwards, remoteproc team has renamed
modem subsystem to mpss subsystem. So, icnss driver
should register for mpss subsystem rather than modem
subsystem.

Change-Id: I68276c7b03a4819ba0e219f1019a73eafa3ac456
Signed-off-by: Sandeep Singh <quic_sandsing@quicinc.com>

icnss2/main.c

@@ -2129,7 +2129,7 @@ static int icnss_modem_ssr_register_notifier(struct icnss_priv *priv)
 	priv->modem_ssr_nb.priority = 1;
 
 	priv->modem_notify_handler =
-		qcom_register_ssr_notifier("modem", &priv->modem_ssr_nb);
+		qcom_register_ssr_notifier("mpss", &priv->modem_ssr_nb);
 
 	if (IS_ERR(priv->modem_notify_handler)) {
 		ret = PTR_ERR(priv->modem_notify_handler);