Change in coreboot[master]: soc/intel/alderlake/retimer: Change loglevel prefix

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Chen Wisley, Wisley Chen.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62821 )

Change subject: soc/intel/alderlake/retimer: Change loglevel prefix
......................................................................

Patch Set 1: Code-Review+2

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/62821/comment/c6de7286_91f150ed 
PS1, Line 9: It shows the ec mapped port, so change the loglevel to BIOS_INFO.
suggestion:
```
This message is not really an error message, so BIOS_ERR is inappropriate. Since the message is informational, switch to 
BIOS_INFO instead
```