KVM: VMX: fix page leak in hardware_setup()

vmx_io_bitmap_b should not be allocated twice.

Fixes: 23611332938d ("KVM: VMX: refactor setup of global page-sized bitmaps")
Signed-off-by: Jim Mattson <[e-mail]>
Reviewed-by: Krish Sadhukhan <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Signed-off-by: Radim Krčmář <[e-mail]>

arch/x86/kvm/vmx.c

···
 			goto out;
 	}
 
-	vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL);
 	memset(vmx_vmread_bitmap, 0xff, PAGE_SIZE);
 	memset(vmx_vmwrite_bitmap, 0xff, PAGE_SIZE);