giga: add log uarts

Author: pennam

variants/arduino_giga_r1_stm32h747xx_m7/arduino_giga_r1_stm32h747xx_m7.overlay

@@ -320,9 +320,15 @@
 /{
 	chosen {
 		zephyr,camera = &dcmi;
+		zephyr,log-uart = &log_uarts;
 		/* zephyr,console = &board_cdc_acm_uart; */
 	};
 
+	log_uarts: log_uarts {
+		compatible = "zephyr,log-uart";
+		uarts = <&usart2 &board_cdc_acm_uart>;
+	};
+
 	/* used to overcome problems with _C analog pins */
 	gpioz: gpio@deadbeef {
 		compatible = "vnd,gpio";