There's a kind of duplication of functionality between NetDisco and
"xiaomi" component, the latter features its own "discovery" in addition
to general HomeAssistant discovery service, based on NetDisco. As such,
this patch is pretty simple: the only purpose of NetDisco discovery
is "plug and play", "zero configuration" discovery that Xiaomi Gateway
device is present on the local network, and triggering of "xiaomi"
component loading, which then "rediscovers" the gateway using its own
method.
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