Public bug reported:

THis one is created to track the commit merge of the mlxbf-tmfifo driver
to support ctrl message and MAC configuration.

SRU Justification:

[Impact]
* N/A.

[Fix]
* N/A.

[Test Case]
* Set DISPLAY_LEVEL to 1 in /dev/rshim0/misc and do 'cat /dev/rshim0/misc' from 
external rshim driver. 
  The rshim MAC address will show up.
# cat /dev/rshim0/misc
DISPLAY_LEVEL   1 (0:basic, 1:advanced, 2:log)
BOOT_MODE       1 (0:rshim, 1:emmc, 2:emmc-boot-swap)
BOOT_TIMEOUT    100 (seconds)
DROP_MODE       0 (0:normal, 1:drop)
SW_RESET        0 (1: reset)
DEV_NAME        usb-1-1.1
DEV_INFO        BlueField-2(Rev 0)
OPN_STR         MBF2M516A-EEEO
BOOT_RESET_SKIP 0 (1: skip)
PEER_MAC        00:1a:ca:ff:ff:01 (rw)
PXE_ID          0x00000000 (rw)
VLAN_ID         0 0 (rw)
* echo "PEER_MAC        xx:xx:xx:xx:xx:xx" > /dev/rshim0/misc to modify the MAC 
address, which will take effect in next boot.

[Regression Potential]
* This is a new enhancement and is backward-compatible with previous behavior.

[Other]
* N/A

** Affects: linux-bluefield (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1927253

Title:
  mlxbf-tmfifo: Add ctrl message and MAC configuration

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