MAINTAINERS: remove Thomas Falcon from IBM ibmvnic

We have not seen emails or tags from Thomas's IBM address
([email protected]) in over 5 years. Looks like Thomas
is active in perf tooling at Intel ([email protected]).

Subsystem IBM Power SRIOV Virtual NIC Device Driver
  Changes 49 / 134 (36%)
  Last activity: 2025-08-26
  Haren Myneni <[email protected]>:
    Tags 3c14917 2025-08-26 00:00:00 2
  Rick Lindsley <[email protected]>:
  Nick Child <[email protected]>:
    Author d93a6ca 2025-03-25 00:00:00 14
    Tags d93a6ca 2025-03-25 00:00:00 16
  Thomas Falcon <[email protected]>:
  Top reviewers:
    [22]: [email protected]
    [13]: [email protected]
    [9]: [email protected]
    [3]: [email protected]
  INACTIVE MAINTAINER Thomas Falcon <[email protected]>

Move Thomas to CREDITS as the initial author of ibmvnic.

Acked-by: Thomas Falcon <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

CREDITS

@@ -1242,6 +1242,10 @@ N: Veaceslav Falico
 E: [email protected]
 D: Co-maintainer and co-author of the network bonding driver.
 
+N: Thomas Falcon
+E: [email protected]
+D: Initial author of the IBM ibmvnic network driver
+
 N: János Farkas
 E: [email protected]
 D: romfs, various (mostly networking) fixes

MAINTAINERS

@@ -12212,7 +12212,6 @@ IBM Power SRIOV Virtual NIC Device Driver
 M:	Haren Myneni <[email protected]>
 M:	Rick Lindsley <[email protected]>
 R:	Nick Child <[email protected]>
-R:	Thomas Falcon <[email protected]>
 L:	[email protected]
 S:	Maintained
 F:	drivers/net/ethernet/ibm/ibmvnic.*