cpio: fix boot with dynamic /dev

Devtmpfs doesn't get automounted by the kernel when an initramfs is used.
Since cpio archives are used almost exclusively as an initramfs, the same
fix should be applied to it as for the initramfs.

Cfr. commit 424888e47431db738f5f9b3c6392435bfce7a842 and
10a130f91e5b947e2d2558443ff09b1686eac273.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2 files changed