KVM: SVM: Use str_enabled_disabled() helper in svm_hardware_setup()

Remove hard-coded strings by using the str_enabled_disabled() helper
function.

Suggested-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://lore.kernel.org/r/20250110101100.272312-2-thorsten.blum@linux.dev


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