x86/msr: Move ARCH_CAP_XAPIC_DISABLE bit definition to its rightful place

The ARCH_CAP_XAPIC_DISABLE bit of MSR_IA32_ARCH_CAP is not in the
correct sorted order. Move it where it belongs.

No functional change.

  [ bp: Massage commit message. ]

Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/243317ff6c8db307b7701a45f71e5c21da80194b.1705632532.git.pawan.kumar.gupta@linux.intel.com