MAINTAINERS: align Danilo's maintainer entries

Some entries use my kernel.org address, while others use my Red Hat one.

Since this is a bit of an inconvinience for me, align them to all use the
same (kernel.org) address.

Signed-off-by: Danilo Krummrich <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

MAINTAINERS

···
 DRM DRIVER FOR NVIDIA GEFORCE/QUADRO GPUS
 M:	Karol Herbst <[e-mail]>
 M:	Lyude Paul <[e-mail]>
-M:	Danilo Krummrich <[e-mail]>
+M:	Danilo Krummrich <[e-mail]>
 L:	[e-mail]
 L:	[e-mail]
 S:	Supported
···
 FIRMWARE LOADER (request_firmware)
 M:	Luis Chamberlain <[e-mail]>
 M:	Russ Weight <[e-mail]>
-M:	Danilo Krummrich <[e-mail]>
+M:	Danilo Krummrich <[e-mail]>
 L:	[e-mail]
 S:	Maintained
 F:	Documentation/firmware_class/