x86/XPTI: reduce .text.entry
This exposes less code pieces and at the same time reduces the range
covered from slightly above 3 pages to a little below 2 of them.
The code being moved is unchanged, except for the removal of trailing
blanks, insertion of blanks between operands, and a pointless q suffix
from "retq".
A few more small pieces could be moved, but it seems better to me to
leave them where they are to not make it overly hard to follow code
paths.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>