tests: drivers: counter: basic_api: add overlay for nucleo_l476rg

Add overlay for nucleo_l476rg to enable counter_basic_api
tests on this board. The prescalers of the timers will result
in a counter frequency of 1 MHz.

Signed-off-by: Jan Kablitz <[email protected]>

Author: kabeljan

tests/drivers/counter/counter_basic_api/boards/nucleo_l476rg.overlay

@@ -0,0 +1,66 @@
+&timers2 {
+	st,prescaler = <79>;
+	counter {
+		status = "okay";
+	};
+};
+
+&timers3 {
+	st,prescaler = <79>;
+	counter {
+		status = "okay";
+	};
+};
+
+&timers4 {
+	st,prescaler = <79>;
+	counter {
+		status = "okay";
+	};
+};
+
+&timers5 {
+	st,prescaler = <79>;
+	counter {
+		status = "okay";
+	};
+};
+
+&timers6 {
+	st,prescaler = <79>;
+	counter {
+		status = "okay";
+	};
+};
+
+&timers7 {
+	st,prescaler = <79>;
+	counter {
+		status = "okay";
+	};
+};
+
+&timers15 {
+	st,prescaler = <79>;
+	counter {
+		status = "okay";
+	};
+};
+
+&timers16 {
+	st,prescaler = <79>;
+	counter {
+		status = "okay";
+	};
+};
+
+&timers17 {
+	st,prescaler = <79>;
+	counter {
+		status = "okay";
+	};
+};
+
+&rtc {
+	status = "disabled";
+};