[LEDE-DEV] [patch]layerscape: update uboot/fman, add 64b/32b target for ls1046ardb device

[Y.T. Jiang]

Hi all,

https://github.com/lede-project/source/pull/593
This PR include three patches:
 [PATCH 1/3] layerscape: uboot-layerscape: prefer github over git.freescale.com
 [PATCH 2/3] layerscape: fman-ucode: prefer github over git.freescale.com
 [PATCH 3/3] layerscape: add 64b/32b target for ls1046ardb device

For avoid the impact of the merger of the company and the potential rebase of the SDK repositories, migrate the uboot-layerscape and fman-ucode source to github, so update them PKG_SOURCE_URL.
Add a new ls1046ardb device support.

Please review, thanks.


Thanks & Best Regards
Jiang Yutang