I was finally able to get a corsstool-ng built with all the latest code, built and working
Trying to build a working kernel, but keep getting a error to do with DRM
$this->bbcode_second_pass_code('', 'scripts/kconfig/conf --silentoldconfig Kconfig
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
make[1]: `include/generated/mach-types.h' is up to date.
CALL scripts/checksyscalls.sh
CHK include/generated/compile.h
CC drivers/gpu/drm/tegra/bus.o
CC drivers/gpu/drm/tegra/drm.o
CC drivers/gpu/drm/tegra/gem.o
CC drivers/gpu/drm/tegra/fb.o
CC drivers/gpu/drm/tegra/dc.o
drivers/gpu/drm/tegra/dc.c: In function 'tegra_dc_debugfs_init':
drivers/gpu/drm/tegra/dc.c:1069:2: error: implicit declaration of function 'drm_debugfs_create_files' [-Werror=implicit-function-declaration]
err = drm_debugfs_create_files(dc->debugfs_files,
^
drivers/gpu/drm/tegra/dc.c: In function 'tegra_dc_debugfs_exit':
drivers/gpu/drm/tegra/dc.c:1091:2: error: implicit declaration of function 'drm_debugfs_remove_files' [-Werror=implicit-function-declaration]
drm_debugfs_remove_files(dc->debugfs_files, ARRAY_SIZE(debugfs_files),
^
cc1: some warnings being treated as errors
make[4]: *** [drivers/gpu/drm/tegra/dc.o] Error 1
make[3]: *** [drivers/gpu/drm/tegra] Error 2
make[2]: *** [drivers/gpu/drm] Error 2
make[1]: *** [drivers/gpu] Error 2
make: *** [drivers] Error 2
')
Done a bit of Googling but haven't been able to find a solution yet.