sb/intel/lynxpoint/me_9.x.c: Constify string array

Jenkins complains about `const char *` and says it should instead be
changed to `const char *const`. So, change it so that Jenkins is happy.

Tested with BUILD_TIMELESS=1, Asrock B85M Pro4 does not change.

Change-Id: Iecd5fecdefdc2effd0114706648747460d0a4a72
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42630
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/southbridge/intel/lynxpoint/me_9.x.c b/src/southbridge/intel/lynxpoint/me_9.x.c
index b2d6f5e..d182e31 100644
--- a/src/southbridge/intel/lynxpoint/me_9.x.c
+++ b/src/southbridge/intel/lynxpoint/me_9.x.c
@@ -32,7 +32,7 @@
 #endif
 
 /* Path that the BIOS should take based on ME state */
-static const char *me_bios_path_values[] __unused = {
+static const char *const me_bios_path_values[] __unused = {
 	[ME_NORMAL_BIOS_PATH]		= "Normal",
 	[ME_S3WAKE_BIOS_PATH]		= "S3 Wake",
 	[ME_ERROR_BIOS_PATH]		= "Error",