Moderate Security Issues in Microcode_ctl for Red Hat Enterprise Linux 8.0

Security Fix(es):
* hw: Special Register Buffer Data Sampling (SRBDS) (CVE-2020-0543)
* hw: L1D Cache Eviction Sampling (CVE-2020-0549)
* hw: Vector Register Data Sampling (CVE-2020-0548)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fixes:
* Update Intel CPU microcode to microcode-20200609 release: - Addition of 06-4d-08/0x01 (AVN B0/C0) microcode at revision 0x12d; - Addition of 06-55-06/0xbf (CLX-SP B0) microcode at revision 0x4002f01; - Addition of 06-7a-08/0x01 (GLK R0) microcode at revision 0x16; - Update of 06-2d-06/0x6d (SNB-E/EN/EP C1/M0) microcode from revision 0x61f up to 0x621; - Update of 06-2d-07/0x6d (SNB-E/EN/EP C2/M1) microcode (in intel-06-2d-07/intel-ucode/06-2d-07) from revision 0x718 up to 0x71a; - Update of 06-3c-03/0x32 (HSW C0) microcode from revision 0x27 up to 0x28; - Update of 06-3d-04/0xc0 (BDW-U/Y E0/F0) microcode from revision 0x2e up to 0x2f; - Update of 06-45-01/0x72 (HSW-U C0/D0) microcode from revision 0x25 up to 0x26; - Update of 06-46-01/0x32 (HSW-H C0) microcode from revision 0x1b up to 0x1c; - Update of 06-47-01/0x22 (BDW-H/Xeon E3 E0/G0) microcode from revision 0x21 up to 0x22; - Update of 06-4e-03/0xc0 (SKL-U/Y D0) microcode from revision 0xd4 up to 0xdc; - Update of 06-55-03/0x97 (SKX-SP B1) microcode from revision 0x1000150 up to 0x1000157; - Update of 06-55-04/0xb7 (SKX-SP H0/M0/U0, SKX-D M1) microcode (in intel-06-55-04/intel-ucode/06-55-04) from revision 0x2000064 up to 0x2006906; - Update of 06-55-07/0xbf (CLX-SP B1) microcode from revision 0x500002b up to 0x5002f01; - Update of 06-5e-03/0x36 (SKL-H/S R0/N0) microcode from revision 0xd4 up to 0xdc; - Update of 06-7a-01/0x01 (GLK B0) microcode from revision 0x2e up to 0x32; - Update of 06-7e-05/0x80 (ICL-U/Y D1) microcode from revision 0x46 up to 0x78; - Update of 06-8e-09/0x10 (AML-Y22 H0) microcode from revision 0xc6 up to 0xd6; - Update of 06-8e-09/0xc0 (KBL-U/Y H0) microcode from revision 0xc6 up to 0xd6; - Update of 06-8e-0a/0xc0 (CFL-U43e D0) microcode from revision 0xc6 up to 0xd6; - Update of 06-8e-0b/0xd0 (WHL-U W0) microcode from revision 0xc6 up to 0xd6; - Update of 06-8e-0c/0x94 (AML-Y42 V0, CML-Y42 V0, WHL-U V0) microcode from revision 0xc6 up to 0xd6; - Update of 06-9e-09/0x2a (KBL-G/H/S/X/Xeon E3 B0) microcode from revision 0xc6 up to 0xd6; - Update of 06-9e-0a/0x22 (CFL-H/S/Xeon E3 U0) microcode from revision 0xc6 up to 0xd6; - Update of 06-9e-0b/0x02 (CFL-S B0) microcode from revision 0xc6 up to 0xd6; - Update of 06-9e-0c/0x22 (CFL-H/S P0) microcode from revision 0xae up to 0xd6; - Update of 06-9e-0d/0x22 (CFL-H R0) microcode from revision 0xc6 up to 0xd6. - Update of 06-a6-00/0x80 (CML-U 6+2 A0) from revision 0xc6 up to 0xca. * Do not update 06-4e-03 (SKL-U/Y) and 06-5e-03 (SKL-H/S/Xeon E3 v5) to revision 0xdc, use 0xd6 by default. * Enable 06-2d-07 (SNB-E/EN/EP) caveat by default. * Add 06-55-04 (SKL-X/W) caveat, enable it by default. * Update stale posttrans dependency, add triggers for proper handling of the debug kernel flavour along with kernel-rt. * Avoid find being SIGPIPE'd on early "grep -q" exit in the dracut script. * Re-generate initramfs not only for the currently running kernel, but for several recently installed kernels as well. * Change the URL to point to the GitHub repository since the microcode download section at Intel Download Center does not exist anymore. * Avoid temporary file creation, used for here-documents in check_caveats.