net/bnxt: remove support for some PCI IDs

net/bnxt: remove support for some PCI IDs

As announced the deprecation notice during the 20.11 release,
remove support for NetXtreme devices belonging to BCM573xx and
BCM5740x families. Specifically the support for the following Broadcom
PCI device IDs: 0x16c8, 0x16c9, 0x16ca, 0x16ce, 0x16cf, 0x16df, 0x16d0,
0x16d1, 0x16d2, 0x16d4, 0x16d5, 0x16e7, 0x16e8, 0x16e9 has been removed.

Deprecation notice has been removed and release notes for 21.02 has
been updated accordingly.

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>