[Kobo] Always set the warmth on the KA1 (#5468)
[Kobo] Always set the warmth on the KA1 (#5468)

It might be possible to instead only set the white led, but I don't
have the hardware to test that theory, se, eh.

Fix #5465 (probably.)
poire-z/koreader,Hzj-jie/koreader,NiLuJe/koreader,koreader/koreader,poire-z/koreader,mwoz123/koreader,mihailim/koreader,NiLuJe/koreader,koreader/koreader,Markismus/koreader,Frenzie/koreader,Frenzie/koreader,pazos/koreader