ARM: dts: microchip: sama7d65: Force SDMMC Legacy mode

The SDMMC in this IP currently only supports legacy mode
due to a hardware quirk, setting the flags to reflect the limitation.

Fixes: deaa14a ("ARM: dts: microchip: add support for sama7d65_curiosity board")
Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20250819170528.126010-1-Ryan.Wanner@microchip.com
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>

Author: ryan-wanner

arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts

@@ -387,6 +387,8 @@
 
 &sdmmc1 {
 	bus-width = <4>;
+	no-1-8-v;
+	sdhci-caps-mask = <0x0 0x00200000>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sdmmc1_default>;
 	status = "okay";