[M] Change in coreboot[master]: mb/intel/mtlrvp: Add bootblock and early gpio for MTL-RVP

[Harsha B R (Code Review)]

Attention is currently required from: Ashish Kumar Mishra, Subrata Banik, Haribalaraman Ramasubramanian, Rizwan Qureshi, Krishna P Bhat D, Balaji Manigandan, Ronak Kanabar, Usha P.

Harsha B R has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69886 )

Change subject: mb/intel/mtlrvp: Add bootblock and early gpio for MTL-RVP
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Patch Set 8:

(1 comment)

File src/mainboard/intel/mtlrvp/bootblock.c:

https://review.coreboot.org/c/coreboot/+/69886/comment/b10e8eff_d7d4e98f 
PS7, Line 8: variant_configure_early_gpio_pads
> wondering what would be the variant for RVP? is this meaningful even ?

Since this is now integral part of gpio.c, variant is not required.