Add chip to the DRM parser class

[Deezzir]

Adds a chip label to the DRM parser class so the data can be related to hwmon metrics when exported by the node_exporter.

For example, node_exporter produces the following metric:

node_hwmon_chip_names{agent_hostname="ubuntu-0", chip="0000:9d:00_0_0000:9e:00_0", chip_name="amdgpu", instance="ubuntu-0.maas"}

So, by having a chip label coming from the DRM parser, DRM metrics can be related to hwmon sensor metrics to build a better dashboard with clear AMD GPU filters.

For example:

node_drm_card_info{agent_hostname="ubuntu-0", card="card0", instance="ubuntu-0.maas", chip="0000:9d:00_0_0000:9e:00_0", memory_vendor="samsung", power_performance_level="auto", vendor="amd"}

Also closes: #673

[Deezzir]

@discordianfish and @SuperQ please review! Thank you