Fix fallback entry getting generated when NO_DRACUT_FALLBACK is true

src/usr/lib/kernel/install.d/90-loaderentry-fallback.install

@@ -28,6 +28,9 @@ INITRD_OPTIONS_SHIFT=4
 
 [ "$KERNEL_INSTALL_LAYOUT" = "bls" ] || exit 0
 
+# Read the optional config file
+[[ -f /etc/kernel-install-for-dracut.conf ]] && source /etc/kernel-install-for-dracut.conf
+
 MACHINE_ID="${KERNEL_INSTALL_MACHINE_ID:?}"
 ENTRY_TOKEN="${KERNEL_INSTALL_ENTRY_TOKEN:?}"
 BOOT_ROOT="${KERNEL_INSTALL_BOOT_ROOT:?}"
@@ -58,6 +61,9 @@ case "$COMMAND" in
         ;;
 esac
 
+# Do nothing if the user has elected to omit the fallback initrd
+[[ ${NO_DRACUT_FALLBACK} == "true" ]] && exit 0
+
 if [ -f /etc/os-release ]; then
     # shellcheck source=/dev/null
     . /etc/os-release