MFC r331562 (manu):
release: arm: Copy boot.scr from ports

Latest u-boot update need u-boot script to load and start ubldr.
(See D14230 for more details)
Copy this file for our arm release on the fat partition.

MFC r325373, r325861:
r325373 (manu):
release/arm: Do not install ubldr

r325861 (manu):
release: Update u-boot and firmware file for RPI-B target.

Sponsored by: The FreeBSD Foundation

MFC r325950, r325953:
r325950:
Sort variables for consistency.

r325953:
Add general configuration files used by release/release.sh for
big-iron installation images.

Sponsored by: The FreeBSD Foundation

MFC r316617 (partial):
- Use the 'conv=sync' dd(1) option to fix writing the u-boot.imx
file to the md(4) device for IMX6-based boards.

Sponsored by: The FreeBSD Foundation

Increase the IMX (CUBOX-HUMMINGBOARD, WANDBOARD) image size to
successfully build.

While here, add the SRCBRANCH to the CUBOX-HUMMINGBOARD.conf and
GUMSTIX.conf.

This is a direct commit to stable/10, as the images for stable/11
are already larger than this.

Sponsored by: The FreeBSD Foundation

MFC r288374:
In addition to the ubldr file, also copy ubldr.bin to the
MS-DOS partition. This will help with transitioning to
a single arm/armv6 userland build which could be used for
all FreeBSD/armv6 images without UBLDR_LOADADDR being set
for each board (ultimately requiring a separate buildworld
for each currently).

Sponsored by: The FreeBSD Foundation

MFC r284333:
Reduce the arm/armv6 image size from 1G to 480M.

Since the images are effectively mostly zeros at 1G,
reduce the size to allow installation on smaller SD
cards, such as 512Mb.

While here, stop writing the /boot.txt file on the
WANDBOARD, which isn't used anyway.

Sponsored by: The FreeBSD Foundation

MFC r283920, r283991, r283992, r284102:

r283920:
Add a configuration file to support the Cubox/Hummingboard SoC.

r283991:
Add initial support for building images for the Duovero Gumstix
board.

r283992:
Fix a whitespace nit.

r284102:
Set the correct UBLDR_LOADADDR for the Wandboard and
Cubox/Hummingboard images.

Sponsored by: The FreeBSD Foundation

MFC r288374:
In addition to the ubldr file, also copy ubldr.bin to the
MS-DOS partition. This will help with transitioning to
a single arm/armv6 userland build which could be used for
all FreeBSD/armv6 images without UBLDR_LOADADDR being set
for each board (ultimately requiring a separate buildworld
for each currently).

Sponsored by: The FreeBSD Foundation

MFC r284333:
Reduce the arm/armv6 image size from 1G to 480M.

Since the images are effectively mostly zeros at 1G,
reduce the size to allow installation on smaller SD
cards, such as 512Mb.

While here, stop writing the /boot.txt file on the
WANDBOARD, which isn't used anyway.

Sponsored by: The FreeBSD Foundation

MFC r283920, r283991, r283992, r284102:

r283920:
Add a configuration file to support the Cubox/Hummingboard SoC.

r283991:
Add initial support for building images for the Duovero Gumstix
board.

r283992:
Fix a whitespace nit.

r284102:
Set the correct UBLDR_LOADADDR for the Wandboard and
Cubox/Hummingboard images.

Sponsored by: The FreeBSD Foundation