[INI] Fix memory leaks + other fixes (#38)

* [INI] Fix memory leaks + other fixes

* Add ini_free
* check and return if NULL pointer in free()
* Add button check with timeout
* Fix a bug in menu rendering that tries to parse a string without existing
* Change initial cnt value to max (fixes menus with first entry not a selectable entry)
* Some & ? clarifications

* [INI] Add get selected boot cfg

- This allows to free ini as we launch the firmware and have the lowest mem leak

* [INI] Rename ini section clone/free functions

ipl/hos.c

@@ -109,7 +109,7 @@ u32 crc32c(const u8 *buf, u32 len)
 	{
 		crc ^= *buf++;
 		for (int i = 0; i < 8; i++)
-			crc = crc & 1 ? (crc >> 1) ^ CRC32C_POLY : crc >> 1;
+			crc = (crc & 1) ? (crc >> 1) ^ CRC32C_POLY : crc >> 1;
 	}
 	return ~crc;
 }