Documentation: kvm: fix a typo

Fixes: 9824c83 ("Documentation: kvm: document CPUID bit for MSR_KVM_POLL_CONTROL")
Signed-off-by: Li Qiang <liq3ea@163.com>
Link: https://lore.kernel.org/r/20201002150422.6267-1-liq3ea@163.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Author: terenceli

Documentation/virt/kvm/cpuid.rst

@@ -78,7 +78,7 @@ KVM_FEATURE_PV_SEND_IPI           11          guest checks this feature bit
                                               before enabling paravirtualized
                                               sebd IPIs
 
-KVM_FEATURE_PV_POLL_CONTROL       12          host-side polling on HLT can
+KVM_FEATURE_POLL_CONTROL          12          host-side polling on HLT can
                                               be disabled by writing
                                               to msr 0x4b564d05.