iio: pressure: bmp280: remove unused options from device tree documentation

There are several options in the device tree documentation that are
no longer relevant for the current in-kernel bmp280 driver so this patch
removes them.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/pressure/bmp085.txt

@@ -8,10 +8,6 @@ Required properties:
   "bosch,bme280"
 
 Optional properties:
-- chip-id: configurable chip id for non-default chip revisions
-- temp-measurement-period: temperature measurement period (milliseconds)
-- default-oversampling: default oversampling value to be used at startup,
-  value range is 0-3 with rising sensitivity.
 - interrupt-parent: should be the phandle for the interrupt controller
 - interrupts: interrupt mapping for IRQ
 - reset-gpios: a GPIO line handling reset of the sensor: as the line is
@@ -24,9 +20,6 @@ Example:
 pressure@77 {
 	compatible = "bosch,bmp085";
 	reg = <0x77>;
-	chip-id = <10>;
-	temp-measurement-period = <100>;
-	default-oversampling = <2>;
 	interrupt-parent = <&gpio0>;
 	interrupts = <25 IRQ_TYPE_EDGE_RISING>;
 	reset-gpios = <&gpio0 26 GPIO_ACTIVE_LOW>;