Revert "inittab: Add getty launch on hvc0 for qemuppc64"

This reverts commit ed69ef20167da0986bc9363d1a91e62001995af4.

The console entry has already been added into /etc/inittab based
on the SERIAL_CONSOLES. So drop this redundant entry.

Signed-off-by: Kevin Hao <kexin.hao@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 633f0c6b)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>