[XS] Change in coreboot[main]: soc/intel/alderlake: Fix uninitialized usb_cfg pointer

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Dinesh Gehlot, Jayvik Desai, Kapil Porwal, Nick Vaccaro, Subrata Banik.

Karthik Ramasubramanian has posted comments on this change by Karthik Ramasubramanian. ( https://review.coreboot.org/c/coreboot/+/84939?usp=email )

Change subject: soc/intel/alderlake: Fix uninitialized usb_cfg pointer
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Patch Set 2:

(1 comment)

File src/soc/intel/alderlake/fsp_params.c:

https://review.coreboot.org/c/coreboot/+/84939/comment/8cc25392_9501a47a?usp... :
PS2, Line 908: 
             : 		usb_cfg = port->chip_info;
> can we add a NULL check here ?

The next line confirms that usb_cfg is not NULL.

From the static analyzer's standpoint, we may not even enter the while loop or everything in the loop is skipped based on if block in line 906. So usb_cfg will be NULL and hence needs to be checked specifically in line 934.