plugins: Fix qemu_plugin_read_memory_vaddr parameters

The declaration uses uint64_t for addr.

Fixes: 595cd9ce2e ("plugins: add plugin API to read guest memory")
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

plugins/api.c

@@ -561,7 +561,7 @@ GArray *qemu_plugin_get_registers(void)
     return create_register_handles(regs);
 }
 
-bool qemu_plugin_read_memory_vaddr(vaddr addr, GByteArray *data, size_t len)
+bool qemu_plugin_read_memory_vaddr(uint64_t addr, GByteArray *data, size_t len)
 {
     g_assert(current_cpu);