s390/setup: Fix secure ipl message

The new machine loader on z15 always creates an IPL Report block and
thus sets the IPL_PL_FLAG_IPLSR even when secure boot is disabled. This
causes the wrong message being printed at boot. Fix this by checking for
IPL_PL_FLAG_SIPL instead.

Fixes: 9641b8cc733f ("s390/ipl: read IPL report at early boot")
Signed-off-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 9cbf490..d5fbd75 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -1052,7 +1052,7 @@
 
 	if (!early_ipl_comp_list_addr)
 		return;
-	if (ipl_block.hdr.flags & IPL_PL_FLAG_IPLSR)
+	if (ipl_block.hdr.flags & IPL_PL_FLAG_SIPL)
 		pr_info("Linux is running with Secure-IPL enabled\n");
 	else
 		pr_info("Linux is running with Secure-IPL disabled\n");