KVM: pfncache: remove unnecessary exports

There is no need for the existing kvm_gpc_XXX() functions to be exported.
Clean up now before additional functions are added in subsequent patches.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Link: https://lore.kernel.org/r/20240215152916.1158-3-paul@xen.org
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: Paul Durrant

virt/kvm/pfncache.c

@@ -94,7 +94,6 @@ bool kvm_gpc_check(struct gfn_to_pfn_cache *gpc, unsigned long len)
 
 	return true;
 }
-EXPORT_SYMBOL_GPL(kvm_gpc_check);
 
 static void *gpc_map(kvm_pfn_t pfn)
 {
@@ -346,7 +345,6 @@ int kvm_gpc_refresh(struct gfn_to_pfn_cache *gpc, unsigned long len)
 {
 	return __kvm_gpc_refresh(gpc, gpc->gpa, len);
 }
-EXPORT_SYMBOL_GPL(kvm_gpc_refresh);
 
 void kvm_gpc_init(struct gfn_to_pfn_cache *gpc, struct kvm *kvm,
 		  struct kvm_vcpu *vcpu, enum pfn_cache_usage usage)
@@ -363,7 +361,6 @@ void kvm_gpc_init(struct gfn_to_pfn_cache *gpc, struct kvm *kvm,
 	gpc->pfn = KVM_PFN_ERR_FAULT;
 	gpc->uhva = KVM_HVA_ERR_BAD;
 }
-EXPORT_SYMBOL_GPL(kvm_gpc_init);
 
 int kvm_gpc_activate(struct gfn_to_pfn_cache *gpc, gpa_t gpa, unsigned long len)
 {
@@ -388,7 +385,6 @@ int kvm_gpc_activate(struct gfn_to_pfn_cache *gpc, gpa_t gpa, unsigned long len)
 	}
 	return __kvm_gpc_refresh(gpc, gpa, len);
 }
-EXPORT_SYMBOL_GPL(kvm_gpc_activate);
 
 void kvm_gpc_deactivate(struct gfn_to_pfn_cache *gpc)
 {
@@ -426,4 +422,3 @@ void kvm_gpc_deactivate(struct gfn_to_pfn_cache *gpc)
 		gpc_unmap(old_pfn, old_khva);
 	}
 }
-EXPORT_SYMBOL_GPL(kvm_gpc_deactivate);