dt-bindings: i2c: ce4100: Replace "ti,pcf8575" by "nxp,pcf8575"

The TI part is equivalent to the NXP part, and its compatible value is
not documented in the DT bindings.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Documentation/devicetree/bindings/i2c/i2c-pxa-pci-ce4100.txt

@@ -71,7 +71,7 @@ This is an example which is used on FalconFalls:
 			/* This I2C controller has one gpio controller */
 			gpio@26 {
 				#gpio-cells = <2>;
-				compatible = "ti,pcf8575";
+				compatible = "nxp,pcf8575";
 				reg = <0x26>;
 				gpio-controller;
 			};
@@ -85,7 +85,7 @@ This is an example which is used on FalconFalls:
 
 			gpio@26 {
 				#gpio-cells = <2>;
-				compatible = "ti,pcf8575";
+				compatible = "nxp,pcf8575";
 				reg = <0x26>;
 				gpio-controller;
 			};