x86/boot/compressed/64: Use LEA to initialize boot stack pointer

It's shorter, and it's what is used in every other place, so make it
consistent.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200107194436.2166846-2-nivedita@alum.mit.edu
This commit is contained in:
Arvind Sankar 2020-01-07 14:44:35 -05:00 • committed by Borislav Petkov
commit 48bfdb9def