Revert "init: Wait for /dev/hvc1 during ARCVM first-stage mount"

This reverts commit b885e4ad533ea4d12e18a0147d298be0cd8cec72.

Reason for revert: No longer needed (using virtio-blk instead)

Change-Id: I667f0d4f58060e781a5e9b21c778cd568b92971a
3 files changed