[nrf noup] dts: nordic: Switch saadc pin definitions for generic ones

Switch saadc pin definitions for generic ones defined in nrf-saadc.h

Signed-off-by: Jakub Zymelka <jakub.zymelka@nordicsemi.no>

Author: jaz1-nordic

dts/vendor/nordic/nrf54l20.dtsi

@@ -6,7 +6,7 @@
 
 #include <mem.h>
 #include <nordic/nrf_common.dtsi>
-#include <zephyr/dt-bindings/adc/nrf-saadc-nrf54l.h>
+#include <zephyr/dt-bindings/adc/nrf-saadc.h>
 #include <zephyr/dt-bindings/regulator/nrf5x.h>
 
 /delete-node/ &sw_pwm;