[S] Change in coreboot[main]: soc/intel/cse: Check PSR bit before issuing PSR backup command

[Subrata Banik (Code Review)]

Attention is currently required from: Anil Kumar K, Krishna P Bhat D, Rizwan Qureshi.

Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74874?usp=email )

Change subject: soc/intel/cse: Check PSR bit before issuing PSR backup command
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Patch Set 6:

(3 comments)

File src/soc/intel/common/block/cse/cse_lite.c:

https://review.coreboot.org/c/coreboot/+/74874/comment/e70b9427_9f0d07ea :
PS6, Line 1077: 	printk(BIOS_INFO, "Check if PSR is supported in this SKU !\n");
same

https://review.coreboot.org/c/coreboot/+/74874/comment/f033dbb3_98a3a504 :
PS6, Line 1090: 	printk(BIOS_DEBUG, "PSR is supported in this SKU !\n");
we don't need such prints

https://review.coreboot.org/c/coreboot/+/74874/comment/28a52c74_94b16251 :
PS6, Line 1106: 
shouldn't we check this at line #1100 ?

what is the boot time impact ? care to add a timestamp ?