x86/irq: Cleanup ordering of vector numbers

Sort vector number assignments in proper descending order. No functional
change.

Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/1430913538-1415-6-git-send-email-Aravind.Gopalakrishnan@amd.com


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