[coreboot] #162: Move SYSTEM_TYPE to Kconfig

[coreboot]

#162: Move SYSTEM_TYPE to Kconfig
----------------------------+-----------------------------------------------
    Reporter:  oxygene      |         Owner:  oxygene          
        Type:  enhancement  |        Status:  new              
    Priority:  minor        |     Milestone:                   
   Component:  coreboot     |      Keywords:                   
Dependencies:               |   Patchstatus:  there is no patch
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 SYSTEM_TYPE is used to tell coreboot if the board is "server", "desktop"
 or "laptop". It's only used for AMD for now, but could also be used
 elsewhere to tweak configuration (and there's a flag in some table, maybe
 ACPI, that tells the OS about the system type, too).

 It's defined for some boards, there's a default defined somewhere in the
 code, that looks a lot like a good match for Kconfig.

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Ticket URL: <https://tracker.coreboot.org/trac/coreboot/ticket/162>
coreboot <http://www.coreboot.org/>