Change in coreboot[master]: soc/mediatek: Extract spm_parse_firmware to common

[Rex-BC Chen (Code Review)]

Attention is currently required from: Hung-Te Lin, Xi Chen, Yu-Ping Wu.
Rex-BC Chen has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55139 )

Change subject: soc/mediatek: Extract spm_parse_firmware to common
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Patch Set 2:

(2 comments)

File src/soc/mediatek/common/spm.c:

https://review.coreboot.org/c/coreboot/+/55139/comment/1c8d3f26_bfd70793 
PS1, Line 5: //#include <device/mmio.h>
> remove this

Done

https://review.coreboot.org/c/coreboot/+/55139/comment/93487fb9_5fb17686 
PS1, Line 9: //#include <soc/symbols.h>
> remove this

Done