target/s390x/kvm: Use vaddr in find/insert_hw_breakpoint()

target/s390x/kvm: Use vaddr in find/insert_hw_breakpoint()

Since commit b8a6eb1862a both kvm_arch_insert_hw_breakpoint()
and kvm_arch_remove_hw_breakpoint() use a vaddr type. Use the
same type for the callees.

Fixes: b8a6eb1862a ("sysemu/kvm: Use vaddr for kvm_arch_[insert|remove]_hw_breakpoint")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250707171059.3064-2-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>