dt-bindings: Fix I2C bus node names in examples

I2C bus node names are expected to be just "i2c", if there is just one
such node in given example.  Replace remaining bad examples with
scripted:

  git grep -l '\si2c[0-9] {' Documentation/devicetree/ | xargs sed -i -e 's/i2c[0-9] {/i2c {/'

Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/20260114081322.53411-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/embedded-controller/lenovo,yoga-c630-ec.yaml

@@ -50,7 +50,7 @@ additionalProperties: false
 examples:
   - |+
     #include <dt-bindings/interrupt-controller/irq.h>
-    i2c1 {
+    i2c {
         clock-frequency = <400000>;
 
         #address-cells = <1>;

Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml

@@ -95,7 +95,7 @@ examples:
     #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/media/video-interfaces.h>
 
-    i2c0 {
+    i2c {
         #address-cells = <1>;
         #size-cells = <0>;
 

Documentation/devicetree/bindings/usb/ite,it5205.yaml

@@ -49,7 +49,7 @@ additionalProperties: false
 examples:
   - |
     #include <dt-bindings/interrupt-controller/irq.h>
-    i2c2 {
+    i2c {
         #address-cells = <1>;
         #size-cells = <0>;