There was a typo in the LED definition for the mode of non-standard
qca8k LEDs. Mode for link speed was wrongly set to link-10 link-100
link-1000 while the real mode in sysfs is link_10 link_100 and
link_1000.
Fix the entry to the correct mode.
Fixes: c707cff6c94b ("ipq806x: add LEDs definition for non-standard qca8k LEDs")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>