dt-bindings: iio/adc: qcom,spmi-iadc: fix reg description

The IADC register is just the base address in the SPMI PMIC and does not
include any length.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231130171628.12257-2-johan+linaro@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/adc/qcom,spmi-iadc.yaml

@@ -25,7 +25,7 @@ properties:
       - const: qcom,spmi-iadc
 
   reg:
-    description: IADC base address and length in the SPMI PMIC register map
+    description: IADC base address in the SPMI PMIC register map
     maxItems: 1
 
   qcom,external-resistor-micro-ohms: