MAINTAINERS: Use Daniel Thompson's korg address for Backlight work

Going forward, I'll be using my kernel.org address for upstream work.

Signed-off-by: Daniel Thompson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

Author: Daniel Thompson

MAINTAINERS

@@ -3803,7 +3803,7 @@ F:	drivers/net/wireless/broadcom/b43legacy/
 
 BACKLIGHT CLASS/SUBSYSTEM
 M:	Lee Jones <[email protected]>
-M:	Daniel Thompson <daniel.thompson@linaro.org>
+M:	Daniel Thompson <danielt@kernel.org>
 M:	Jingoo Han <[email protected]>
 L:	[email protected]
 S:	Maintained