arm: dts: k3*: Use local header for SERDES MUX idle-state values

The DTS uses constants for SERDES MUX idle state values which were earlier
provided as bindings header. But they are unsuitable for bindings.
So move these constants in a header next to DTS.

NOTE: sync with v6.6-rc1 will bring in this change naturally.

Signed-off-by: Nishanth Menon <nm@ti.com>

arch/arm/dts/k3-am642-evm.dts

@@ -6,11 +6,11 @@
 /dts-v1/;
 
 #include <dt-bindings/phy/phy.h>
-#include <dt-bindings/mux/ti-serdes.h>
 #include <dt-bindings/leds/common.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/net/ti-dp83867.h>
 #include "k3-am642.dtsi"
+#include "k3-serdes.h"
 
 / {
 	compatible = "ti,am642-evm", "ti,am642";

arch/arm/dts/k3-am642-sk.dts

@@ -5,12 +5,12 @@
 
 /dts-v1/;
 
-#include <dt-bindings/mux/ti-serdes.h>
 #include <dt-bindings/phy/phy.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/net/ti-dp83867.h>
 #include <dt-bindings/leds/common.h>
 #include "k3-am642.dtsi"
+#include "k3-serdes.h"
 
 / {
 	compatible = "ti,am642-sk", "ti,am642";

arch/arm/dts/k3-j7200-common-proc-board.dts

@@ -8,8 +8,8 @@
 #include "k3-j7200-som-p0.dtsi"
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/net/ti-dp83867.h>
-#include <dt-bindings/mux/ti-serdes.h>
 #include <dt-bindings/phy/phy.h>
+#include "k3-serdes.h"
 
 / {
 	chosen {

arch/arm/dts/k3-j721e-main.dtsi

@@ -6,7 +6,7 @@
  */
 #include <dt-bindings/phy/phy.h>
 #include <dt-bindings/mux/mux.h>
-#include <dt-bindings/mux/ti-serdes.h>
+#include "k3-serdes.h"
 
 / {
 	cmn_refclk: clock-cmnrefclk {