docs(maintainers): add NPU driver owners

Code owners have been added for the Arm(R) Ethos(TM)-N NPU driver.

Change-Id: I0bda0d95151cdff5cd3a793c6c0e9ef6a9a5f50b
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
1 file changed