MAINTAINERS: Add Manivannan Sadhasivam as Reviewer for PCI native host bridge and endpoint drivers

I've been reviewing the native host bridge drivers for some time and would
like to be listed as a Reviewer formally.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Manivannan Sadhasivam <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>

Author: Mani-Sadhasivam

MAINTAINERS

@@ -17616,6 +17616,7 @@ F:	drivers/pci/controller/pci-xgene-msi.c
 PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS
 M:	Lorenzo Pieralisi <[email protected]>
 M:	Krzysztof Wilczyński <[email protected]>
+R:	Manivannan Sadhasivam <[email protected]>
 R:	Rob Herring <[email protected]>
 L:	[email protected]
 S:	Supported