ar71xx: add kernel support for the TP-Link TL-WDR4900 v2.0 board

Patch-by: TenNinjas <tenninjas@tenninjas.ca>
Patchwork: http://patchwork.openwrt.org/patch/4848/
[juhosg:
  - rename and refresh kernel patch,
  - merge the board setup code into mach-archer-c7.c and drop
    mach-tl-wdr49000-v2.c]
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39635 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: add user-space support for TP-Link TL-WDR4900 v2.0 board

Patch-by: TenNinjas <tenninjas@tenninjas.ca>
Patchwork: http://patchwork.openwrt.org/patch/4849/
[juhosg:
  - use the Archer C7 specific LED setup instead of adding
    identical code]
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39636 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: add profile and build image for TP-Link TL-WDR4900 v2.0 board

Patch-by: TenNinjas <tenninjas@tenninjas.ca>
Patchwork: http://patchwork.openwrt.org/patch/4850/
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39637 3c298f89-4303-0410-b956-a3cf2f4a3e73