Install WiFi firmware during Surface setup

profiles/ManuSurface/Arch/setup.sh

@@ -1,9 +1,12 @@
 #!/bin/bash
 pushd "${BASH_SOURCE%/*}" > /dev/null;
 
+ARCH_MOUNT_ROOT="/mnt" \
 ARCH_DISK=nvme0n1 \
 ARCH_HOSTNAME="manu-surface" \
 USER_DISPLAYNAME="Manuel Thalmann" \
     . "../../../scripts/Arch/OS/setup.sh";
 
+pacstrap -K "/mnt" linux-firmware-marvell;
+
 popd > /dev/null;