ipq806x: fix wireless macs

Commit 71a39b86 ("ipq806x: Fix wireless support for Netgear Nighthawk X4S
D7800") added a trailing TAB char after the backslash which prevents
the assignment of the correct MACs for wifi devices.

Fixes: FS#451

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
[reworded commit message]
Signed-off-by: Mathias Kresin <dev@kresin.me>