MAINTAINERS: MMU GATHER: Update Aneesh's address

Aneesh's IBM address no longer works, switch to his preferred kernel.org
address.
Acked-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240430044327.49363-1-mpe@ellerman.id.au

MAINTAINERS

@@ -14898,7 +14898,7 @@ F:	drivers/phy/marvell/phy-pxa-usb.c
 
 MMU GATHER AND TLB INVALIDATION
 M:	Will Deacon <will@kernel.org>
-M:	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
+M:	"Aneesh Kumar K.V" <aneesh.kumar@kernel.org>
 M:	Andrew Morton <akpm@linux-foundation.org>
 M:	Nick Piggin <npiggin@gmail.com>
 M:	Peter Zijlstra <peterz@infradead.org>