KVM: arm64: Remove unused __sve_save_state

Now that we don't have any users left for __sve_save_state, remove
it altogether. Should we ever need to save the SVE state from the
hypervisor again, we can always re-introduce it.
Suggested-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

arch/arm64/include/asm/kvm_hyp.h

@@ -90,7 +90,6 @@ void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu);
 
 void __fpsimd_save_state(struct user_fpsimd_state *fp_regs);
 void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs);
-void __sve_save_state(void *sve_pffr, u32 *fpsr);
 void __sve_restore_state(void *sve_pffr, u32 *fpsr);
 
 #ifndef __KVM_NVHE_HYPERVISOR__

arch/arm64/kvm/hyp/fpsimd.S

@@ -25,9 +25,3 @@ SYM_FUNC_START(__sve_restore_state)
 	sve_load 0, x1, x2, 3
 	ret
 SYM_FUNC_END(__sve_restore_state)
-
-SYM_FUNC_START(__sve_save_state)
-	mov	x2, #1
-	sve_save 0, x1, x2, 3
-	ret
-SYM_FUNC_END(__sve_save_state)