Change in coreboot[master]: mb/google/dedede/var/storo: Support LTE module

[zanxi chen (Code Review)]

Attention is currently required from: Martin Roth, Henry Sun, Paul Menzel, Weimin Wu, Karthik Ramasubramanian.
zanxi chen has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/51017 )

Change subject: mb/google/dedede/var/storo: Support LTE module
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Patch Set 5:

(2 comments)

File src/mainboard/google/dedede/variants/storo/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/51017/comment/6b3a0725_e1181a50 
PS3, Line 86:  "20"
> 20 ms or 10 ms?

Done

File src/mainboard/google/dedede/variants/storo/variant.c:

https://review.coreboot.org/c/coreboot/+/51017/comment/a99ba077_ef87654f 
PS3, Line 11: mdelay(20);
> Is it 20 ms or 10 ms. The LTE module used by all the variants require only 10 ms. […]

Done