MAINTAINERS: add Danilo to DRIVER CORE

Let's keep an eye on the Rust abstractions; add myself as reviewer to
DRIVER CORE.

Signed-off-by: Danilo Krummrich <dakr@kernel.org>

Author: Danilo Krummrich

MAINTAINERS

@@ -7021,6 +7021,7 @@ F:	include/linux/component.h
 DRIVER CORE, KOBJECTS, DEBUGFS AND SYSFS
 M:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 R:	"Rafael J. Wysocki" <rafael@kernel.org>
+R:	Danilo Krummrich <dakr@kernel.org>
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
 F:	Documentation/core-api/kobject.rst