Change in coreboot[master]: mb/google/dedede/var/magolor: Add initial CdClock value

[Paul Menzel (Code Review)]

Attention is currently required from: Henry Sun, Ren Kuo, Simon Yang, Kane Chen, Karthik Ramasubramanian.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/60301 )

Change subject: mb/google/dedede/var/magolor: Add initial CdClock value
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Patch Set 3:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/60301/comment/fd7beb38_eed0c22b 
PS3, Line 7: mb/google/dedede/var/magolor: Add initial CdClock value
Please be explicit:
> Set core display clock to 172.8 MHz

https://review.coreboot.org/c/coreboot/+/60301/comment/d25fc048_ae37a42e 
PS3, Line 9: Add initial CdClock value to get more stable boot up in OS.
Please start by describing the problem:
> With the default core display clock of … MHz, sometimes Chrome OS hangs(?) in ….