linux-firmware: add firmware for qat_402xx devices

Add firmware images for Intel QAT 402xx crypto/compression accelerators.

This firmware is taken from Intel QuickAssist Technology Hardware
Version 2.0 package QAT20.L.1.2.30-00013.

Firmware version: 1.2.40

Release notes for this firmware are reported at [1].

$ sha256sum qat_402*
b82b6faf0d1da97b78d2ec3b78cbdb3f769cbb1339227b82025d0f2ca4857037  qat_402xx.bin
e08d6fa7ee7079e6eaa06f1b92dbfcf7cc60f8a6ec6894710ec1001388bd6d57  qat_402xx_mmp.bin

Link: https://intel.github.io/quickassist/RN/In-Tree/index.html [1]
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>

WHENCE

@@ -4275,6 +4275,8 @@ File: qat_c62x_mmp.bin
 Link: qat_mmp.bin -> qat_895xcc_mmp.bin
 File: qat_4xxx.bin
 File: qat_4xxx_mmp.bin
+File: qat_402xx.bin
+File: qat_402xx_mmp.bin
 
 Licence: Redistributable. See LICENCE.qat_firmware for details