asoc: codecs: Add support for class ab low power modes

Add codec enable and disable sequences for class ab
low power modes.

Change-Id: If5b54075985c2d4d1a24423c03e78bee119862bc
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>

include/asoc/wcd-clsh.h

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
- * Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2015-2019, The Linux Foundation. All rights reserved.
  */
 
 #ifndef _WCD_CLSH
@@ -62,6 +62,8 @@ enum {
 	CLS_H_LOHIFI, /* LoHIFI */
 	CLS_H_ULP, /* Ultra Low power */
 	CLS_AB_HIFI, /* Class-AB */
+	CLS_AB_LP, /* Class-AB Low Power */
+	CLS_AB_LOHIFI, /* Class-AB Low HIFI */
 	CLS_NONE, /* None of the above modes */
 };