ipq40xx: fritzbox-7530.dts: increase dma coherent pool size

This is needed by the mei driver to be able to download the firmware.

Signed-off-by: Martin Schiller <[email protected]>
Signed-off-by: Andre Heider <[email protected]>

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-fritzbox-7530.dts

@@ -9,6 +9,10 @@
 	model = "AVM FRITZ!Box 7530";
 	compatible = "avm,fritzbox-7530";
 
+	chosen {
+		bootargs-append = " coherent_pool=4M";
+	};
+
 	aliases {
 		led-boot = &power_green;
 		led-failsafe = &info_red;