Convert the board to support the video driver model, add the device
tree node, and remove the unnecessary code.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

The SAMA5D27-SiP (System in Package) integrates the SAMA5D2
with 1Gbit DDR2-SDRAM in a single package.

The SAMA5D27 SOM1 embeds a 64Mbit QSPI flash, KSZ8081 Phy and
Mac-address EEPROM.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

For sama5d2, add the sfr node with syscon support.

In order to access the SFR_UTMICKTRIM register for the utmi clock
driver, add the phandle property for the utmi node to point to the
sfr node.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>

Use the Atmel PIT timer driver which supports the driver model
and device tree.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>

Add the "u-boot,dm-pre-reloc" property to determine which nodes
which are needed by SPL and by the board_init_f stage.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>

Add clock property for uart1 node.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>

Fix the warning from dtc like,
---8<----
Warning (unit_address_vs_reg): Node /ahb/apb/pmc@f0014000/periph64ck/sdmmc0_hclk has a reg or ranges property, but no unit name
--->8----

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Stephen Warren <swarren@nvidia.com>

Add device tree for SAMA5D2 Xplained board.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>