add missing crypto modules for aarch64

Fixes https://github.com/dracutdevs/dracut/issues/711

modules.d/90crypt/module-setup.sh

@@ -28,6 +28,7 @@ installkernel() {
     arch=$(uname -m)
     [[ $arch == x86_64 ]] && arch=x86
     [[ $arch == s390x ]] && arch=s390
+    [[ $arch == aarch64 ]] && arch=arm64
     instmods dm_crypt =crypto =drivers/crypto =arch/$arch/crypto
 }