Add additional Neuron drivers

[yeazelm]

Description of changes:
There are situations where manually overriding the Neuron driver chosen by the PCI detection may be warranted. This provides those drivers for those times. All automatic behavior is intact, these are just present on the filesystem for those use cases.

Testing done:
Built an aws-ecs-3 with these drivers and manually loaded the driver to show it working.

Details

bash-5.2# driverdog link-modules
20:16:02 [INFO] Copied neuron.ko
20:16:02 [INFO] Copied neuron.ko
bash-5.2# ls -al /lib/modules/6.12.73/kernel/drivers/neuron/neuron.ko
-rw-r--r--. 1 root root 868777 Mar 12 20:16 /lib/modules/6.12.73/kernel/drivers/neuron/neuron.ko
bash-5.2# find . -name "neuron.ko"
./var/lib/kernel-modules/.overlay/upper/6.12.73/kernel/drivers/neuron/neuron.ko
./x86_64-bottlerocket-linux-gnu/sys-root/usr/lib/modules/6.12.73/kernel/drivers/neuron/neuron.ko
./x86_64-bottlerocket-linux-gnu/sys-root/usr/libexec/neuron/neuron_2_21/neuron.ko
./x86_64-bottlerocket-linux-gnu/sys-root/usr/libexec/neuron/neuron_7372/neuron.ko
./x86_64-bottlerocket-linux-gnu/sys-root/usr/libexec/neuron/neuron_7693/neuron.ko
./x86_64-bottlerocket-linux-gnu/sys-root/usr/libexec/neuron/neuron_8072/neuron.ko
./x86_64-bottlerocket-linux-gnu/sys-root/usr/libexec/neuron/neuron_latest/neuron.ko
bash-5.2# rm /lib/modules/6.12.73/kernel/drivers/neuron/neuron.ko
bash-5.2# cp ./x86_64-bottlerocket-linux-gnu/sys-root/usr/libexec/neuron/neuron_8072/neuron.ko /lib/modules/6.12.73/kernel/drivers/neuron/neuron.ko
bash-5.2# modprobe neuron
bash-5.2# modinfo neuron
filename:       /lib/modules/6.12.73/kernel/drivers/neuron/neuron.ko
alias:          pci:v00001d0fd00007064sv*sd*bc*sc*i*
version:        2.x.8072.0
license:        GPL
description:    Neuron Driver, built from SHA: 381f0e424131a6a8ab4599de7edd7170ee3388c1
import_ns:      DMA_BUF
srcversion:     55CAB5764D30359F7D21735
depends:
name:           neuron
retpoline:      Y
vermagic:       6.12.73 SMP preempt mod_unload modversions
sig_id:         PKCS#7
signer:
sig_key:
sig_hashalgo:   unknown
signature:
parm:           userver_pds_node_cnt:pds ultraserver node count (int)
parm:           userver_pds_server_id:pds ultraserver id (int)
parm:           userver_ctl:ultraserver election control (int)
parm:           userver_etimeout:ultraserver election timeout (int)
parm:           force_userver:Force Neuron UltraServer (int)
parm:           force_die_flip:Force Neuron Core Mapping APIs to give back DIE flip mappings (int)
parm:           nmetric_metric_post_delay:Minimum time to wait (in milliseconds) before posting metrics again (uint)
parm:           nmetric_log_posts:1: send metrics to CW, 2: send metrics to trace, 3: send metrics to both (uint)
parm:           no_reset:Dont reset device (int)
parm:           nc_per_dev_param:Number of neuron cores (int)
parm:           dev_nc_map:Map of active neuron cores (int)
parm:           dma_teardown_on_exit:Reset the DMA state on user process exit (int)
parm:           zerocopy_trn1_override:override zerocopy for trn1 (int)
parm:           mempool_min_alloc_size:Minimum size for memory allocation (int)
parm:           mempool_host_memory_size:Host memory to reserve(in bytes) (int)
parm:           mempool_small_pool_size:Size of genpool for small allocations (in bytes) (ulong)
parm:           mempool_small_alloc_max:Threshold (in bytes) for deciding if an allocation is small (ulong)
parm:           dup_helper_enable:enable duplicate routing id unload helper (int)
parm:           wc_enable:enable write combining (int)

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[yeazelm]

^ Updated from PR comments to include the 2x_ prefix.