exec/memory: Use correct type size

Use uint8_t for (unsigned) byte.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210518183655.1711377-7-philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/include/exec/memory.h b/include/exec/memory.h
index c8b9088..175d715 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -2305,7 +2305,7 @@
 }
 
 static inline void address_space_stb_cached(MemoryRegionCache *cache,
-    hwaddr addr, uint32_t val, MemTxAttrs attrs, MemTxResult *result)
+    hwaddr addr, uint8_t val, MemTxAttrs attrs, MemTxResult *result)
 {
     assert(addr < cache->len);
     if (likely(cache->ptr)) {