[S] Change in coreboot[main]: drivers/intel/usb4: Add mainboard function to get EC port

[Subrata Banik (Code Review)]

Attention is currently required from: Derek Huang, Dinesh Gehlot, Eran Mitrani, Intel coreboot Reviewers, Jakub "Kuba" Czapiga, Kapil Porwal, Tarun.

Subrata Banik has posted comments on this change by Derek Huang. ( https://review.coreboot.org/c/coreboot/+/86673?usp=email )

Change subject: drivers/intel/usb4: Add mainboard function to get EC port
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Patch Set 3:

(1 comment)

File src/soc/intel/meteorlake/retimer.c:

https://review.coreboot.org/c/coreboot/+/86673/comment/c23d24bd_bc9cf16b?usp... :
PS3, Line 16: 	int ec_port = 0;
            : 
            : 	ec_port = mainboard_retimer_get_index_for_typec(typec_port);
            : 	if (ec_port >= 0) {
            : 		printk(BIOS_INFO, "USB Type-C %d mapped to EC port %d\n", typec_port,
            : 		       ec_port);
            : 		return ec_port;
            : 	} else {
            : 		ec_port = 0;
            : 	}
```
int ec_port = mainboard_retimer_get_index_for_typec(typec_port);

if (ec_port >= 0) {
    printk(BIOS_INFO, "USB Type-C %d mapped to EC port %d\n", typec_port, ec_port);
    return ec_port;
} else {
    printk(BIOS_WARN, "USB Type-C %d not mapped to any EC port\n", typec_port);
    return 0; // Default to 0 when no mapping is found.
}
```