ARM: dts: dra7xx: Fix compatible string for PCF8575 chip

The boards use a TI variant of the PCF8575 so specify that
in the compatible string.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7-evm.dts

@@ -556,7 +556,7 @@ sysen2: sysen2 {
 	};
 
 	pcf_lcd: gpio@20 {
-		compatible = "nxp,pcf8575";
+		compatible = "ti,pcf8575", "nxp,pcf8575";
 		reg = <0x20>;
 		gpio-controller;
 		#gpio-cells = <2>;
@@ -567,7 +567,7 @@ pcf_lcd: gpio@20 {
 	};
 
 	pcf_gpio_21: gpio@21 {
-		compatible = "nxp,pcf8575";
+		compatible = "ti,pcf8575", "nxp,pcf8575";
 		reg = <0x21>;
 		lines-initial-states = <0x1408>;
 		gpio-controller;
@@ -601,7 +601,7 @@ &i2c2 {
 	clock-frequency = <400000>;
 
 	pcf_hdmi: gpio@26 {
-		compatible = "nxp,pcf8575";
+		compatible = "ti,pcf8575", "nxp,pcf8575";
 		reg = <0x26>;
 		gpio-controller;
 		#gpio-cells = <2>;

arch/arm/boot/dts/dra72-evm-common.dtsi

@@ -408,7 +408,7 @@ tps65917_power_button {
 	};
 
 	pcf_gpio_21: gpio@21 {
-		compatible = "nxp,pcf8575";
+		compatible = "ti,pcf8575", "nxp,pcf8575";
 		reg = <0x21>;
 		lines-initial-states = <0x1408>;
 		gpio-controller;
@@ -440,7 +440,7 @@ &i2c5 {
 	clock-frequency = <400000>;
 
 	pcf_hdmi: pcf8575@26 {
-		compatible = "nxp,pcf8575";
+		compatible = "ti,pcf8575", "nxp,pcf8575";
 		reg = <0x26>;
 		gpio-controller;
 		#gpio-cells = <2>;