Exclude specific -firmware packages only

[simaishi]

We're currently excluding *-firmware packages. But linux-firmware is required by kernel and installed. Instead of excluding *-firmware, excluding all firmware that's not linux-firmware to avoid possible package conflict during install.

Mar 11 21:41:09 localhost packaging[1202]: deselect package *-firmware
...
Mar 11 21:41:14 localhost yum[1202]: TSINFO: Marking linux-firmware-20180911-69.git85c5d90.el7.noarch
as install for kernel-3.10.0-957.5.1.el7.x86_64

Verified only linux-firmware is present on the machine by running a build with this change.

[miq-bot]

Checked commit simaishi@4c0eff2 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
0 files checked, 0 offenses detected
Everything looks fine. 🍰