MAINTAINERS: eth: mark IBM eHEA as an Orphan

Current maintainer Douglas Miller has left IBM and no replacement has
been assigned for the driver. The eHEA hardware was last used on
IBM POWER7 systems, the last of which reached end-of-support at the
end of 2020.

Signed-off-by: David Christensen <[email protected]>
Reviewed-by: Pradeep Satyanarayana <[email protected]>
Acked-by: Michael Ellerman <[email protected]> (powerpc)
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: David Christensen

MAINTAINERS

@@ -7829,9 +7829,8 @@ W:	http://aeschi.ch.eu.org/efs/
 F:	fs/efs/
 
 EHEA (IBM pSeries eHEA 10Gb ethernet adapter) DRIVER
-M:	Douglas Miller <[email protected]>
 L:	[email protected]
-S:	Maintained
+S:	Orphan
 F:	drivers/net/ethernet/ibm/ehea/
 
 ELM327 CAN NETWORK DRIVER