giga: remove not-yet-mainlined cam config

Author: facchinm

loader/boards/arduino_giga_r1_m7.overlay

@@ -63,7 +63,7 @@
 &dcmi {
 	status = "okay";
 	sensor = <&ov7670>;
-	ext-sdram = <&sdram1>;
+	/* ext-sdram = <&sdram1>; */
 	pinctrl-0 = <&dcmi_hsync_ph8 &dcmi_pixclk_pa6 &dcmi_vsync_pi5
 				&dcmi_d0_ph9 &dcmi_d1_ph10 &dcmi_d2_ph11 &dcmi_d3_pg11
 				&dcmi_d4_ph14 &dcmi_d5_pi4 &dcmi_d6_pi6 &dcmi_d7_pi7>;