Group arm64 specific overrides in the same if statement

simple-cdd/simple-cdd.conf

@@ -45,11 +45,7 @@ fi
 # Mirror tools
 mirror_tools="reprepro download"
 mirror_files=""  # Don't try to download README doc/ tools/
-if [ "$ARCH" = "arm64" ]; then
-  require_optional_packages="false"
-else
-  require_optional_packages="true"
-fi
+require_optional_packages="true"
 ignore_missing_checksums="true"
 
 # Mirror variables
@@ -64,14 +60,16 @@ mirror_components="main contrib non-free"
 security_mirror=""
 updates_mirror=""
 
-# Kernel related
+# Kernel and architecture related
 if [ "$ARCH" = "i386" ]; then
     kernel_packages="linux-image-686-pae"
 fi
 if [ "$ARCH" = "arm64" ]; then
     kernel_packages="linux-image-arm64"
-# ARM devices don't typically have a default console set, so we export one here
+    # ARM devices don't typically have a default console set, so we export one here
     export KERNEL_PARAMS="console=tty0 "
+    # Some packages are not available on arm64
+    require_optional_packages="false"
 fi
 
 # Random other variables