KVM: X86: Remove unnecessary GFP_KERNEL_ACCOUNT for temporary variables

Some variables allocated in kvm_arch_vcpu_ioctl are released when
the function exits, so there is no need to set GFP_KERNEL_ACCOUNT.

Signed-off-by: Peng Hao <flyingpeng@tencent.com>
Link: https://lore.kernel.org/r/20240624012016.46133-1-flyingpeng@tencent.com


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