MAINTAINERS: Update Kishon's email address in PCI endpoint subsystem

Update Kishon's email address in PCI endpoint subsystem maintainer
entry and mark him as reviewer.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

MAINTAINERS

@@ -15856,10 +15856,10 @@ F: Documentation/devicetree/bindings/pci/v3-v360epc-pci.txt
 F: drivers/pci/controller/pci-v3-semi.c
 
 PCI ENDPOINT SUBSYSTEM
-M: Kishon Vijay Abraham I <kishon@ti.com>
 M: Lorenzo Pieralisi <lpieralisi@kernel.org>
 R: Krzysztof Wilczyński <kw@linux.com>
 R: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+R: Kishon Vijay Abraham I <kishon@kernel.org>
 L: linux-pci@vger.kernel.org
 S: Supported
 Q: https://patchwork.kernel.org/project/linux-pci/list/