ARM: dts: at91: Add dts files for at91sam9m10g45ek

The device tree source files of at91sam9m10g45ek boards are copied
from the Linux v4.10, do the changes as below.
 - Add the reg property for the pinctrl node.
 - Move the gpio (pioA, pioB, pioC, pioD, pioE) nodes as the pinctrl's
   slibling nodes, instead of the child nodes.
 - Add the "u-boot,dm-pre-reloc" property to determine which nodes
   are used by the board_init_f stage.
 - Fix the compilation warnings.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 2417f1f..129e341 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -352,6 +352,8 @@
 	keystone-k2e-evm.dtb \
 	keystone-k2g-evm.dtb
 
+dtb-$(CONFIG_TARGET_AT91SAM9M10G45EK) += at91sam9m10g45ek.dtb
+
 dtb-$(CONFIG_TARGET_AT91SAM9X5EK) += \
 	at91sam9g15ek.dtb	\
 	at91sam9g25ek.dtb	\