[nrf fromlist] sys: util: Extend IS_EQ to support unsigned literals

Extend IS_EQ to include unsigned integer literals like 0U.

Upstream PR #: 82133

Signed-off-by: Krzysztof Chruściński <[email protected]>

Author: nordic-krch

include/zephyr/sys/util_internal.h

@@ -50,7 +50,7 @@
 #define Z_IS_ENABLED3(ignore_this, val, ...) val
 
 /* Implementation of IS_EQ(). Returns 1 if _0 and _1 are the same integer from
- * 0 to 4095, 0 otherwise.
+ * 0 to 4096, 0 otherwise.
  */
 #define Z_IS_EQ(_0, _1) Z_HAS_COMMA(Z_CAT4(Z_IS_, _0, _EQ_, _1)())