pc-bios/s390-ccw: Make get_boot_index() from menu.c global

We are going to reuse this function for selecting an entry from
the pxelinux.cfg menu, so rename this function with a "menu_"
prefix and make it available globally.

Reviewed-by: Jared Rossi <jrossi@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250709083443.41574-4-thuth@redhat.com>
2 files changed