KVM: x86: Remove PRIx* definitions as they are solely for user space

In the Linux kernel we do not support PRI.64 specifiers.
Moreover they seem not to be used anyway here. Drop them.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230616150233.83813-1-andriy.shevchenko@linux.intel.com


Signed-off-by: Sean Christopherson <seanjc@google.com>