tests: benchmarks: power_consumption: uart: disable console uart rx

To reduce current consumption at interrupt mode for nrf52840.

Signed-off-by: Piotr Kosycarz <[email protected]>

Author: nordic-piks

tests/benchmarks/power_consumption/uart/boards/nrf52840dk_nrf52840.overlay

@@ -7,3 +7,8 @@
 &uart0 {
 	zephyr,pm-device-runtime-auto;
 };
+
+/* Disabling uart rx pin to get low power */
+&uart0 {
+	disable-rx;
+};