common/arm64.nix: allow to pass extra flags to flashrom scripts

src/platform/common/arm64.nix

@@ -10,12 +10,12 @@
     scripts = let
       flashromScript = moreFlags: ''
         set -euo pipefail
-        ${final.flashrom}/bin/flashrom -p linux_mtd ${moreFlags}
+        ${final.flashrom}/bin/flashrom -p linux_mtd ${moreFlags} $@
       '';
       flashromWriteScript = moreFlags:
         flashromScript "-w ${final.image}/coreboot.rom ${moreFlags}";
     in prev.scripts // {
-      flashrom = flashromScript "$@";
+      flashrom = flashromScript "";
       flash-write-fallback = flashromWriteScript "--fmap -i FALLBACK";
       flash-write-normal = flashromWriteScript "--fmap -i NORMAL";
       flash-write-all = flashromWriteScript "";