nitrogen6*_defconfig: bump u-boot and kernel revisions

This update brings several improvements such as:
- switch to a generic Boundary defconfig
  - same across all the Boundary Devices platforms
- support of HDMI to MIPI daugther board
https://boundarydevices.com/product/bd_hdmi_mipi/
- enhanced display support
  - LCD ASIT500MA6F5D
  - LCD A030JN01
  - HDMI 480p

For a complete list of changes:
https://github.com/boundarydevices/linux-imx6/commits/d7a412b
https://github.com/boundarydevices/u-boot-imx6/commits/a4070a8

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

configs/nitrogen6sx_defconfig

@@ -23,14 +23,14 @@ BR2_TARGET_UBOOT_BOARDNAME="nitrogen6sx"
 BR2_TARGET_UBOOT_FORMAT_IMX=y
 BR2_TARGET_UBOOT_CUSTOM_TARBALL=y
 # Last version of branch boundary-v2015.07
-BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION="http://github.com/boundarydevices/u-boot-imx6/tarball/5115a9e/u-boot-5115a9e.tar.gz"
+BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION="http://github.com/boundarydevices/u-boot-imx6/tarball/a4070a8/u-boot-a4070a8.tar.gz"
 
 # kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
 # Last version of branch boundary-imx_3.14.28_1.0.0_ga
-BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="https://github.com/boundarydevices/linux-imx6/tarball/3417c66/linux-imx6-3417c66.tar.gz"
-BR2_LINUX_KERNEL_DEFCONFIG="nitrogen6x"
+BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="https://github.com/boundarydevices/linux-imx6/tarball/d7a412b/linux-imx6-d7a412b.tar.gz"
+BR2_LINUX_KERNEL_DEFCONFIG="boundary"
 BR2_LINUX_KERNEL_ZIMAGE=y
 BR2_LINUX_KERNEL_INSTALL_TARGET=y
 BR2_LINUX_KERNEL_DTS_SUPPORT=y

configs/nitrogen6x_defconfig

@@ -23,14 +23,14 @@ BR2_TARGET_UBOOT_BOARDNAME="nitrogen6q"
 BR2_TARGET_UBOOT_FORMAT_IMX=y
 BR2_TARGET_UBOOT_CUSTOM_TARBALL=y
 # Last version of branch boundary-v2015.07
-BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION="http://github.com/boundarydevices/u-boot-imx6/tarball/5115a9e/u-boot-5115a9e.tar.gz"
+BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION="http://github.com/boundarydevices/u-boot-imx6/tarball/a4070a8/u-boot-a4070a8.tar.gz"
 
 # kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
 # Last version of branch boundary-imx_3.14.28_1.0.0_ga
-BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="https://github.com/boundarydevices/linux-imx6/tarball/3417c66/linux-imx6-3417c66.tar.gz"
-BR2_LINUX_KERNEL_DEFCONFIG="nitrogen6x"
+BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="https://github.com/boundarydevices/linux-imx6/tarball/d7a412b/linux-imx6-d7a412b.tar.gz"
+BR2_LINUX_KERNEL_DEFCONFIG="boundary"
 BR2_LINUX_KERNEL_ZIMAGE=y
 BR2_LINUX_KERNEL_INSTALL_TARGET=y
 BR2_LINUX_KERNEL_DTS_SUPPORT=y