Bluetooth: Classic: L2CAP: Fix building warnings

Use `UINT_TO_POINTER` to convert a number to pointer.
Use `POINTER_TO_UINT` to get a number from a pointer.

Fixes zephyrproject-rtos#87527.

Signed-off-by: Lyle Zhu <[email protected]>

Author: lylezhu2012

subsys/bluetooth/host/classic/l2cap_br.c

@@ -61,11 +61,11 @@ LOG_MODULE_REGISTER(bt_l2cap_br, CONFIG_BT_L2CAP_LOG_LEVEL);
 #define L2CAP_BR_S_FRAME_FLAG_MASK 0xffffff00U
 #define L2CAP_BR_S_FRAME_UD_FLAG   0xffffff00
 #define L2CAP_BR_IS_S_FRAME(flag)                                                \
-	((((uint32_t)flag) & L2CAP_BR_S_FRAME_FLAG_MASK) == L2CAP_BR_S_FRAME_UD_FLAG)
+	((POINTER_TO_UINT(flag) & L2CAP_BR_S_FRAME_FLAG_MASK) == L2CAP_BR_S_FRAME_UD_FLAG)
 
-#define L2CAP_BR_GET_S_BIT(flag) (((uint32_t)flag) & ~L2CAP_BR_S_FRAME_FLAG_MASK)
+#define L2CAP_BR_GET_S_BIT(flag) (POINTER_TO_UINT(flag) & ~L2CAP_BR_S_FRAME_FLAG_MASK)
 
-#define L2CAP_BR_S_FRAME_UD_FLAG_SET(s) ((void *)(L2CAP_BR_S_FRAME_UD_FLAG | (s)))
+#define L2CAP_BR_S_FRAME_UD_FLAG_SET(s) UINT_TO_POINTER(L2CAP_BR_S_FRAME_UD_FLAG | (s))
 #define L2CAP_BR_S_RR_FRAME             L2CAP_BR_S_FRAME_UD_FLAG_SET(BT_L2CAP_CONTROL_S_RR)
 #define L2CAP_BR_S_REJ_FRAME            L2CAP_BR_S_FRAME_UD_FLAG_SET(BT_L2CAP_CONTROL_S_REJ)
 #define L2CAP_BR_S_RNR_FRAME            L2CAP_BR_S_FRAME_UD_FLAG_SET(BT_L2CAP_CONTROL_S_RNR)