HSD#16026967164: arm64: dts: intel: Disable 1.8V, HS200 and HS400 for Agilex5 eMMC

Disable 1.8V signaling and high-speed eMMC modes (HS200/HS400) for the
eMMC controller on Intel SoCFPGA Agilex5 SOCDK.

Changes:
- Add no-1-8-v property to disable 1.8V signaling capability
- Remove mmc-hs200-1_8v property (HS200 mode at 1.8V)
- Remove mmc-hs400-1_8v property (HS400 mode at 1.8V)

This forces the eMMC to operate with 3.3V signaling only and disables
the high-speed modes that require 1.8V operation, ensuring better
hardware compatibility.

Signed-off-by: Tanmay Kathpalia <tanmay.kathpalia@altera.com>

Author: tanmaykathpalia

arch/arm64/boot/dts/intel/socfpga_agilex5_socdk_emmc.dts

@@ -13,11 +13,10 @@
 	status = "okay";
 	no-sd;
 	no-sdio;
+	no-1-8-v;
 	disable-wp;
 	non-removable;
 	cap-mmc-highspeed;
-	mmc-hs200-1_8v;
-	mmc-hs400-1_8v;
 
 	bus-width = <8>;
 	vmmc-supply = <&sd_emmc_power>;