Change in coreboot[master]: [WIP]mb/amd/majolica: Add eSPI support

[Felix Held (Code Review)]

Attention is currently required from: Bao Zheng, Jason Glenesk, Raul Rangel, Marshall Dawson, Zheng Bao.
Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/49966 )

Change subject: [WIP]mb/amd/majolica: Add eSPI support
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Patch Set 4:

(2 comments)

File src/mainboard/amd/majolica/devicetree.cb:

https://review.coreboot.org/c/coreboot/+/49966/comment/d3ce42a0_88b166fe 
PS4, Line 5: 		.std_io_decode_bitmap = ESPI_DECODE_IO_0X60_0X64_EN,
even though the post code display doesn't work yet, i'd still add the port 80 espi decode here

https://review.coreboot.org/c/coreboot/+/49966/comment/9742fa6e_279d7f88 
PS4, Line 6: .generic_io_range[0] = {
           : 			.base = 0x662,
           : 			.size = 8,
           : 		},
is this currently needed? not sure what this is for exactly