pmb/chroot/initfs: change invocation to support the new mkinitfs

The new mkinitfs does not have options for kernel flavor or version

pmb/chroot/initfs.py

@@ -15,13 +15,7 @@ def build(args, flavor, suffix):
 
     # Call mkinitfs
     logging.info(f"({suffix}) mkinitfs {flavor}")
-    release_file = (f"{args.work}/chroot_{suffix}/usr/share/kernel/"
-                    f"{flavor}/kernel.release")
-    with open(release_file, "r") as handle:
-        release = handle.read().rstrip()
-    pmb.chroot.root(args, ["mkinitfs", "-o",
-                           f"/boot/initramfs-{flavor}", release],
-                    suffix)
+    pmb.chroot.root(args, ["mkinitfs"], suffix)
 
 
 def extract(args, flavor, suffix, extra=False):