x86, early_serial_console: Remove unnecessary check

We do this check already a couple of lines up.

Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Link: http://lkml.kernel.org/r/1420009958-4803-1-git-send-email-kuleshovmail@gmail.com


Signed-off-by: Borislav Petkov <bp@suse.de>