initfs.toml: Make the drivers package build dependent on x86_64

This package is essentially redundant for aarch64.
1 job for get-aarch64-buildable in 7 seconds (queued for 1 second)
latest
Status Name Job ID Coverage
  Test
failed img #33251

00:00:07

 
Name Stage Failure
failed
img Test
fatal: clone of 'git@github.com:u-boot/u-boot.git' into submodule path '/builds/redox-os/redox/bootloader-uboot' failed
Failed to clone 'bootloader-uboot'. Retry scheduled
Cloning into '/builds/redox-os/redox/bootloader-uboot'...
error: cannot run ssh: No such file or directory
fatal: unable to fork
fatal: clone of 'git@github.com:u-boot/u-boot.git' into submodule path '/builds/redox-os/redox/bootloader-uboot' failed
Failed to clone 'bootloader-uboot' a second time, aborting
Cleaning up file based variables
ERROR: Job failed: exit code 1