arm64: defconfig: enable MVPP2

The MVPP2 network driver is used for the ARM64 Marvell Armada 7K and 8K
platforms, so enable it in the arm64 defconfig.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm64/configs/defconfig

@@ -185,6 +185,7 @@ CONFIG_HNS_ENET=y
 CONFIG_E1000E=y
 CONFIG_IGB=y
 CONFIG_IGBVF=y
+CONFIG_MVPP2=y
 CONFIG_MVNETA=y
 CONFIG_SKY2=y
 CONFIG_RAVB=y