KVM: SVM: remove unused variable dst_vaddr_end

Variable dst_vaddr_end is being assigned but is never used hence it is
redundant and can be removed.

Cleans up clang warning:
variable 'dst_vaddr_end' set but not used [-Wunused-but-set-variable]
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com>

arch/x86/kvm/svm.c

@@ -6747,7 +6747,7 @@ static int __sev_dbg_encrypt_user(struct kvm *kvm, unsigned long paddr,
 static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
 {
 	unsigned long vaddr, vaddr_end, next_vaddr;
-	unsigned long dst_vaddr, dst_vaddr_end;
+	unsigned long dst_vaddr;
 	struct page **src_p, **dst_p;
 	struct kvm_sev_dbg debug;
 	unsigned long n;
@@ -6763,7 +6763,6 @@ static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
 	size = debug.len;
 	vaddr_end = vaddr + size;
 	dst_vaddr = debug.dst_uaddr;
-	dst_vaddr_end = dst_vaddr + size;
 
 	for (; vaddr < vaddr_end; vaddr = next_vaddr) {
 		int len, s_off, d_off;