- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC r262591, r262592, r262593, r262597, r262598, r262599, r262600, r262601,
r262606

Initial import of Linux/Vendor DTS files for various embedded boards.

Initial import of DTS files from Linux

Correct initial import script

New AT91 devices or fdt probe added to existing devices. Some of these
are just stubs for testing the new dts.
- nand
- SDRAMC
- shdwc
- tcb
- usb host and gadget

MFC r260695, r260696, r260884, r260885, r260886, r260887

Provide a simplified way to specify GPIO pins for the Atmel port.

Add at91 data so we can convert a PIO unit number into a base address.

Add at91 standard memory controller helper functions.

Generalize AT91 NAND support a bit.

Connect NAND for the SAM9260EK eval board, as well as the HotE HL-201.

Add nand device and NANDFS into the mix for those at91 boards that have
support for it at the moment.

MFC r258828:

Add a nand flash controller driver for Atmel at91 family. Tested only
on at91rm9200 so far.

Add a nand flash controller driver for Atmel at91 family. Tested only
on at91rm9200 so far.

The files.at91 has listed a nand driver for ages, but it never existed.