dt-binding: iio: remove rst node from NPCM ADC document

Remove NPCM7xx rst node for preparing the NPCM ADC
document to describe ADC reset binding.
Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/adc/nuvoton,npcm-adc.txt

@@ -14,11 +14,6 @@ Optional properties:
 			   vref-supply is not added the ADC will use internal voltage
 			   reference.
 
-Required Node in the NPCM7xx BMC:
-An additional register is present in the NPCM7xx SOC which is
-assumed to be in the same device tree, with and marked as
-compatible with "nuvoton,npcm750-rst".
-
 Example:
 
 adc: adc@f000c000 {
@@ -27,9 +22,3 @@ adc: adc@f000c000 {
 	interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
 	clocks = <&clk NPCM7XX_CLK_ADC>;
 };
-
-rst: rst@f0801000 {
-	compatible = "nuvoton,npcm750-rst", "syscon",
-	"simple-mfd";
-	reg = <0xf0801000 0x6C>;
-};