[U-Boot] Intel Braswell support

[Bin Meng]

Hi Stefan,

I see Intel has released FSP package for Intel Braswell, the successor
of Intel BayTrail. Actually on the FSP website, they released 3 new
FSP packages, which are: Braswell, Broadwell and Broadwell-DE. I
remember you got a customer who wanted Braswell support. Will you plan
to add that support to U-Boot?

Regards,
Bin