ASoC: wcd9xxx: restrict debugfs permission

Remove read permission for debugfs reg dump node
for group and users to not allow reading of wcd9xxx
registers.

CRs-fixed: 2113240
Bug: 62464339
Change-Id: I73a22e140446828e694fdc95fde7ac4e051c9548
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>

drivers/mfd/wcd9xxx-core.c

@@ -1399,19 +1399,19 @@ static int wcd9xxx_slim_probe(struct slim_device *slim)
 		("wcd9xxx_core", 0);
 	if (!IS_ERR(debugfs_wcd9xxx_dent)) {
 		debugfs_peek = debugfs_create_file("slimslave_peek",
-		S_IFREG | S_IRUGO, debugfs_wcd9xxx_dent,
+		S_IFREG | S_IRUSR, debugfs_wcd9xxx_dent,
 		(void *) "slimslave_peek", &codec_debug_ops);
 
 		debugfs_poke = debugfs_create_file("slimslave_poke",
-		S_IFREG | S_IRUGO, debugfs_wcd9xxx_dent,
+		S_IFREG | S_IRUSR, debugfs_wcd9xxx_dent,
 		(void *) "slimslave_poke", &codec_debug_ops);
 
 		debugfs_power_state = debugfs_create_file("power_state",
-		S_IFREG | S_IRUGO, debugfs_wcd9xxx_dent,
+		S_IFREG | S_IRUSR, debugfs_wcd9xxx_dent,
 		(void *) "power_state", &codec_debug_ops);
 
 		debugfs_reg_dump = debugfs_create_file("slimslave_reg_dump",
-		S_IFREG | S_IRUGO, debugfs_wcd9xxx_dent,
+		S_IFREG | S_IRUSR, debugfs_wcd9xxx_dent,
 		(void *) "slimslave_reg_dump", &codec_debug_ops);
 	}
 #endif