sysutils/u-boot-rpi{3,4}: Add patch to fix PSCI stub reservation

[kevans]

Summary

sysutils/u-boot-rpi{3,4}: Add patch to fix PSCI stub reservation

For the traditional spin table setup, only the lowest page needs
to be reserved.  However, our PSCI stubs are slightly bigger and occupy
a little over one page.  These patches, already sent upstream, allow a
variable number of initial pages to be reserved for the SMP stubs.  We
then set the values for these in our fragment to '2' to reserve the first
and second page.

MFH: 2020Q1
Approved by: koobs (mentor)
Approved by: manu (uboot, maintainer)
Differential_Revision: D24085

Test Plan

Q/A:

• testport (amd64, -CURRENT)

[koobs]

Add maintainers for non-blanket (not implicitly approved) changes as blocking reviewers, eg: if @bapt and @manu are uboot@.

When you add a user as a reviewer, there's two entries per user, add as a reviewer and add as a blocking reviewer

[kevans]

In D24085#529554, @koobs wrote:

Add maintainers for non-blanket (not implicitly approved) changes as blocking reviewers, eg: if @bapt and @manu are uboot@.

When you add a user as a reviewer, there's two entries per user, add as a reviewer and add as a blocking reviewer

I have no idea how to add a blocking reviewer from arc diff --create

[manu]

LGTM
Thanks,

[koobs]

Not sure if you can (that would be cool), just add/change the reviewer type after attaching

[koobs]

Does this need MFH'ing?

[kevans]

In D24085#529564, @koobs wrote:

Does this need MFH'ing?

Sure, why not. =-)

[maciphone2_googlemail.com]

https://reviews.freebsd.org/p/crowston_protonmail.com/ told to set CONFIG_RPI_EFI_NR_SPIN_PAGES=10 for then new RPI4/8GB-model in u-boot 2020.07 to get SMP-support....