plugins: fix-up handling of internal hostaddr for 32 bit

The compiler rightly complains when we build on 32 bit that casting
uint64_t into a void is a bad idea. We are really dealing with a host
pointer at this point so treat it as such. This does involve
a uintptr_t cast of the result of the TLB addend as we know that has
to point to the host memory.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210709143005.1554-28-alex.bennee@linaro.org>

include/qemu/plugin-memory.h

@@ -18,7 +18,7 @@ struct qemu_plugin_hwaddr {
             hwaddr    offset;
         } io;
         struct {
-            uint64_t hostaddr;
+            void *hostaddr;
         } ram;
     } v;
 };