platform/x86: samsung-laptop: set debugfs blobs to read only

Those blobs can only be read. So, don't confuse users with 'writable'
flags. Also, remove S_IFREG because debugfs takes care of that.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210517100746.29663-2-wsa+renesas@sang-engineering.comSigned-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/samsung-laptop.c

@@ -1296,12 +1296,12 @@ static void samsung_debugfs_init(struct samsung_laptop *samsung)
 	debugfs_create_u32("d1", 0644, root, &samsung->debug.data.d1);
 	debugfs_create_u16("d2", 0644, root, &samsung->debug.data.d2);
 	debugfs_create_u8("d3", 0644, root, &samsung->debug.data.d3);
-	debugfs_create_blob("data", 0644, root, &samsung->debug.data_wrapper);
-	debugfs_create_blob("f0000_segment", 0600, root,
+	debugfs_create_blob("data", 0444, root, &samsung->debug.data_wrapper);
+	debugfs_create_blob("f0000_segment", 0400, root,
 			    &samsung->debug.f0000_wrapper);
-	debugfs_create_file("call", S_IFREG | 0444, root, samsung,
+	debugfs_create_file("call", 0444, root, samsung,
 			    &samsung_laptop_call_fops);
-	debugfs_create_blob("sdiag", 0644, root, &samsung->debug.sdiag_wrapper);
+	debugfs_create_blob("sdiag", 0444, root, &samsung->debug.sdiag_wrapper);
 }
 
 static void samsung_sabi_exit(struct samsung_laptop *samsung)