MAINTAINERS: Mark Intel WWAN IOSM driver as orphaned

This maintainer's email no longer works. Remove it from MAINTAINERS.

I've been unable to locate a new maintainer for this at Intel. Mark
the driver as Orphaned.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Loic Poulain <loic.poulain@oss.qualcomm.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>
Acked-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Link: https://patch.msgid.link/20250808174505.C9FF434F@davehans-spike.ostc.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: hansendc

MAINTAINERS

@@ -12724,9 +12724,8 @@ S:	Maintained
 F:	drivers/platform/x86/intel/wmi/thunderbolt.c
 
 INTEL WWAN IOSM DRIVER
-M:	M Chetan Kumar <m.chetan.kumar@intel.com>
 L:	netdev@vger.kernel.org
-S:	Maintained
+S:	Orphan
 F:	drivers/net/wwan/iosm/
 
 INTEL(R) FLEXIBLE RETURN AND EVENT DELIVERY