MAINTAINERS: Add Mahesh J Salgaonkar as EEH maintainer

Update EEH entry:

  - Russell: lacks time to maintain EEH.

  - Oliver: lacks time & hardware to do actual maintenance, but happy to
    field questions and review things.

  - Mahesh: glad to take over EEH maintenance.

[bhelgaas: commit log, add Mahesh, make Oliver reviewer]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Russell Currey <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Acked-by: Michael Ellerman <[email protected]>

Author: ruscur

MAINTAINERS

@@ -15696,8 +15696,8 @@ F:	drivers/pci/endpoint/
 F:	tools/pci/
 
 PCI ENHANCED ERROR HANDLING (EEH) FOR POWERPC
-M:	Russell Currey <[email protected]>
-M:	Oliver O'Halloran <[email protected]>
+M:	Mahesh J Salgaonkar <[email protected]>
+R:	Oliver O'Halloran <[email protected]>
 L:	[email protected]
 S:	Supported
 F:	Documentation/PCI/pci-error-recovery.rst