Change in coreboot[master]: soc/intel/tigerlake: Drop unused `PCH_DEV_SLOT_LPC` macro

[Subrata Banik (Code Review)]

Attention is currently required from: Paul Menzel, Tim Wawrzynczak, Angel Pons, Lean Sheng Tan.
Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/64588 )

Change subject: soc/intel/tigerlake: Drop unused `PCH_DEV_SLOT_LPC` macro
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Patch Set 1:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/64588/comment/24e02666_5764301f 
PS1, Line 10: Tiger Lake SoC PCI device list.
> Won’t it be used in the future?

Since TGL, LPC IP is dropped and eSPI has introduced. Hence, better we drop it to reflect the SoC design. This is used as of date.