KVM: PPC: remove orphan declarations from kvm_ppc.h

Remove the following orphan declarations from kvm_ppc.h:

1. kvmppc_mmu_priv_switch() has been removed since
commit dd9ebf1f ("KVM: PPC: e500: Add shadow PID
support").
2. kvmppc_core_destroy_mmu() has been removed since
commit ecc0981f ("KVM: ppc: cosmetic changes to mmu
hook names").
3. kvmppc_prepare_vrma() has been removed since
commit aa04b4cc ("KVM: PPC: Allocate RMAs (Real Mode
Areas) at boot for use by guests").

So remove the declarations for them from header file.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220913075029.682327-10-cuigaosheng1@huawei.com

arch/powerpc/include/asm/kvm_ppc.h

@@ -104,7 +104,6 @@ extern void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu);
 
 extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
                            unsigned int gtlb_idx);
-extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
 extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
 extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
 extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
@@ -153,7 +152,6 @@ extern int kvmppc_core_check_requests(struct kvm_vcpu *vcpu);
 extern int kvmppc_booke_init(void);
 extern void kvmppc_booke_exit(void);
 
-extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
 extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
 extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
 
@@ -162,8 +160,6 @@ extern void kvmppc_set_hpt(struct kvm *kvm, struct kvm_hpt_info *info);
 extern long kvmppc_alloc_reset_hpt(struct kvm *kvm, int order);
 extern void kvmppc_free_hpt(struct kvm_hpt_info *info);
 extern void kvmppc_rmap_reset(struct kvm *kvm);
-extern long kvmppc_prepare_vrma(struct kvm *kvm,
-				struct kvm_userspace_memory_region *mem);
 extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu,
 			struct kvm_memory_slot *memslot, unsigned long porder);
 extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu);