KVM: x86: Unexport x86_fpu_cache and make it static

Make x86_fpu_cache static now that FPU allocation and destruction is
handled entirely by common x86 code.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200608180218.20946-1-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/include/asm/kvm_host.h

@@ -1306,7 +1306,6 @@ struct kvm_arch_async_pf {
 extern u64 __read_mostly host_efer;
 
 extern struct kvm_x86_ops kvm_x86_ops;
-extern struct kmem_cache *x86_fpu_cache;
 
 #define __KVM_HAVE_ARCH_VM_ALLOC
 static inline struct kvm *kvm_arch_alloc_vm(void)

arch/x86/kvm/x86.c

@@ -239,8 +239,7 @@ u64 __read_mostly host_xcr0;
 u64 __read_mostly supported_xcr0;
 EXPORT_SYMBOL_GPL(supported_xcr0);
 
-struct kmem_cache *x86_fpu_cache;
-EXPORT_SYMBOL_GPL(x86_fpu_cache);
+static struct kmem_cache *x86_fpu_cache;
 
 static struct kmem_cache *x86_emulator_cache;