[FS#423] Linksys WRT1900ACS USB led names are wrong

[LEDE Bugs]

The following task has a new comment added:

FS#423 - Linksys WRT1900ACS USB led names are wrong
User who did this - howl (howl)

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Mathias I see that mamba has usb2-port2 for USB 2 instead usb3-port1 or usb2-port1 like the other models: https://git.lede-project.org/?p=source.git;a=blob;f=target/linux/mvebu/base-files/etc/board.d/01_leds;h=d6e42ddfd590ff8e6136bffafd0c57159f1cbb98;hb=9641ceea0ce68d1c507b9d2bbe7cf8da518a2eb8

You changed it just to be like the other models in your patch: https://git.lede-project.org/?p=lede/mkresin/staging.git;a=blob;f=target/linux/mvebu/base-files/etc/board.d/01_leds;h=a147fa46d463d3b3e43d51e7214c67da3e3a75d7;hb=d4ad139874f7c37f36c5d602443d649f874ff346

I don't have a mamba device to test it.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=423#comment1435