Change in coreboot[master]: mb/google/octopus/var/ampton: add touchscreen into SSFC support

[Paul2 Huang (Code Review)]

Attention is currently required from: Henry Sun, Paul Menzel, Marco Chen.
Paul2 Huang has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59859 )

Change subject: mb/google/octopus/var/ampton: add touchscreen into SSFC support
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Patch Set 9:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/59859/comment/c4acbf72_a3a0a2bf 
PS8, Line 9: ELAN9008(eKTH6913UAY)
> Please add a space before the (.

Done

https://review.coreboot.org/c/coreboot/+/59859/comment/be919058_b756743c 
PS8, Line 14: work
> works

Done

File src/mainboard/google/octopus/variants/baseboard/include/baseboard/cbi_ssfc.h:

https://review.coreboot.org/c/coreboot/+/59859/comment/9ab5545f_307e89cd 
PS7, Line 44: 	SSFC_TOUCHSCREEN_ELAN9008,
> Could you have them with different i2c slave address by either FW or HW strap pin? […]

(1) Checking with EE and vendor
(2) Yes, if ELAN0001 and ELAN9008 both exist in overridetree.cb, then touchscreen no function, until we remove  ELAN0001 from overridetree.cb.