MAINTAINERS: Add Manivannan Sadhasivam as PCI Endpoint maintainer

The PCI endpoint subsystem is evolving at a rate I cannot keep up with,
therefore I am standing down as a maintainer handing over to Manivannan
(currently reviewer for this code) and Krzysztof who are doing an excellent
job on the matter - they don't need my help any longer.

Link: https://lore.kernel.org/r/20240129165933.33428-1-lpieralisi@kernel.org
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Krzysztof Wilczyński <kw@linux.com>

Author: Lorenzo Pieralisi

MAINTAINERS

@@ -16856,9 +16856,8 @@ F:	Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml
 F:	drivers/pci/controller/pcie-xilinx-cpm.c
 
 PCI ENDPOINT SUBSYSTEM
-M:	Lorenzo Pieralisi <lpieralisi@kernel.org>
+M:	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
 M:	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