Master specific index is moved to dt bindings to share across dtsi and driver for the same referencing. This will help to align indexing and controlling of pinctrl with master specific slaves. CRs-Fixed: 2907475, 2954556 Change-Id: Ic5b5537b44af583cb7623ef38a19e67ffe95e95d Signed-off-by: Jigarkumar Zala <jzala@codeaurora.org>