target/mips: Add support for emulation of CRC32 instructions

target/mips: Add support for emulation of CRC32 instructions

Add emulation of MIPS' CRC32 (Cyclic Redundancy Check) instructions.
Reuse zlib crc32() and Linux crc32c().

Corresponding disassembly has been added in commit 99029be1c28
("target/mips: Add implementation of GINVT instruction").

Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Rakic <aleksandar.rakic@htecgroup.com>
Reviewed-by: Aleksandar Rikalo <arikalo@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <PA4PR09MB486489692D843DDFC25F3CF1846B2@PA4PR09MB4864.eurprd09.prod.outlook.com>