Replace Mock BPA crc16 and crc32 functions

[jeronstone]

BSL/src/mock_bpa/crc.c

Lines 33 to 44 in 046549e

	static uint16_t bp_crc16(UsefulBufC data)
	{
	(void)data;
	return 1234; // FIXME replace
	}
	static uint32_t bp_crc32(UsefulBufC data)
	{
	(void)data;
	return 1234567; // FIXME replace
	}