dts:arch:arm64: Reduce the qseecom heap for nightfury

Reduce the qseecom heap for nightfury target to 4 mb
as playready, widevine are not needed.

Change-Id: Id4770dafba04ee0c1bc5d204c8e765dbb38a5b07
Signed-off-by: Jiten Patel <jitepate@codeaurora.org>

arch/arm64/boot/dts/qcom/qcs403-iot-sku1.dts

@@ -82,3 +82,7 @@
 &qnand_1 {
 	status = "ok";
 };
+
+&qseecom_mem {
+	size = <0 0x400000>;
+};