MAINTAINERS: mark Synopsys DW XPCS as Orphan

There's not much review support from Jose, there is a sharp
drop in his participation around 4 years ago.
The DW XPCS IP is very popular and the driver requires active
maintenance.

gitdm missingmaints says:

Subsystem SYNOPSYS DESIGNWARE ETHERNET XPCS DRIVER
  Changes 33 / 94 (35%)
  (No activity)
  Top reviewers:
    [16]: [email protected]
    [12]: [email protected]
    [2]: [email protected]
  INACTIVE MAINTAINER Jose Abreu <[email protected]>

Reviewed-by: Simon Horman <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

CREDITS

@@ -20,6 +20,10 @@ N: Thomas Abraham
 E: [email protected]
 D: Samsung pin controller driver
 
+N: Jose Abreu
+E: [email protected]
+D: Synopsys DesignWare XPCS MDIO/PCS driver.
+
 N: Dragos Acostachioaie
 E: [email protected]
 W: http://www.arbornet.org/~dragos

MAINTAINERS

@@ -22737,9 +22737,8 @@ S:	Supported
 F:	drivers/net/ethernet/synopsys/
 
 SYNOPSYS DESIGNWARE ETHERNET XPCS DRIVER
-M:	Jose Abreu <[email protected]>
 L:	[email protected]
-S:	Supported
+S:	Orphan
 F:	drivers/net/pcs/pcs-xpcs.c
 F:	drivers/net/pcs/pcs-xpcs.h
 F:	include/linux/pcs/pcs-xpcs.h