xtensa: fix sparse warning when converting to uncache pointer

The argument to arch_xtensa_uncached_ptr() is marked as in
the cached address space. However, when it is being passed to
z_xtropflip(), it is simply casted to uint32_t, thus resulting
in sparse warning about discarding "__cached" address space.
This adds __sparse_force to the cast to suppress the warning.

Signed-off-by: Daniel Leung <[email protected]>

Author: dcpleung

include/zephyr/arch/xtensa/cache.h

@@ -177,7 +177,7 @@ static inline void __sparse_cache *arch_xtensa_cached_ptr(void *ptr)
  */
 static inline void *arch_xtensa_uncached_ptr(void __sparse_cache *ptr)
 {
-	return (void *)z_xtrpoflip((uint32_t) ptr,
+	return (void *)z_xtrpoflip((__sparse_force uint32_t)ptr,
 				   CONFIG_XTENSA_UNCACHED_REGION,
 				   CONFIG_XTENSA_CACHED_REGION);
 }