bcm63xx: handle huawei nvram layout

Use a different length for calculating the nvram checksum on hauwei
boards. Fixes boot on HW553 and HW556.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@35533 3c298f89-4303-0410-b956-a3cf2f4a3e73
generic: b53: fix reverted error check in probe

b53_switch_detect returns value returned by b53_read8, which is 0 for
success. So fail (and return error) only if b53_switch_detect returned
something else than 0. This fixes supported and advertising being zeros
for MDIO access.

Cc: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt@35534 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: register the micro sd card reader on RB493G

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@35535 3c298f89-4303-0410-b956-a3cf2f4a3e73