patches/openwrt: add support for 1000base-x SerDes mode on Topaz

Add support to specify 1000base-x SerDes mode via DTS on Turris MOX for
Topaz switch.

This is done by incorporating some two upstream changes that add support
to change SerDes mode on Topaz.
8 jobs for feature/topaz-1000basex in 7 minutes and 7 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Build
passed #558494
lists_generate

00:00:12

passed #558491
medkit_mox

00:07:07

passed #558492
medkit_omnia

00:06:19

passed #558493
medkit_turris1x

00:03:17

passed #558488
prepare_mox

00:02:05

passed #558489
prepare_omnia

00:02:05

passed #558490
prepare_turris1x

00:02:04

 
  Verify
passed #558495
lists_verify

00:00:09