Enable Camera clock on Arduino Portenta H7

We need to start the clock in the same way as we do for the Arduino GIGA.

As without the clock started, most cameras will not even make the camera
visible to I2C

Author: KurtE

loader/fixups.c

@@ -71,7 +71,8 @@ static void zephyr_input_callback(struct input_event *evt, void *user_data) {
 INPUT_CALLBACK_DEFINE(NULL, zephyr_input_callback, NULL);
 #endif
 
-#if defined(CONFIG_BOARD_ARDUINO_GIGA_R1) && defined(CONFIG_VIDEO)
+#if (defined(CONFIG_BOARD_ARDUINO_GIGA_R1) || defined(CONFIG_BOARD_ARDUINO_PORTENTA_H7)) \
+		&& defined(CONFIG_VIDEO)
 #include <zephyr/kernel.h>
 #include <zephyr/device.h>
 #include <zephyr/drivers/clock_control.h>