lwip: Fixed minor debug print format issue

This caused some unsigned int prints out to be printed as singed integer which made the logs unreadable, for example sequence numbers in TCP packet headers

components/lwip/port/esp32/include/arch/cc.h

@@ -64,7 +64,7 @@ typedef int sys_prot_t;
 #define X16_F "x"
 
 #define S32_F "d"
-#define U32_F "d"
+#define U32_F "u"
 #define X32_F "x"
 
 #define PACK_STRUCT_FIELD(x) x