MAINTAINERS: Add Rahul Tanwar as Intel LGM Gateway PCIe maintainer

Add Rahul Tanwar as maintainer for PCIe RC controller driver for the Intel
Lightning Mountain (LGM) Gateway SoC.

Link: https://lore.kernel.org/r/b3249e08155e04ac08d820be3b8da29a913c472a.1625559158.git.rtanwar@maxlinear.comSigned-off-by: Rahul Tanwar <rtanwar@maxlinear.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

MAINTAINERS

@@ -14422,6 +14422,13 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/pci/hisilicon-histb-pcie.txt
 F:	drivers/pci/controller/dwc/pcie-histb.c
 
+PCIE DRIVER FOR INTEL LGM GW SOC
+M:	Rahul Tanwar <rtanwar@maxlinear.com>
+L:	linux-pci@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
+F:	drivers/pci/controller/dwc/pcie-intel-gw.c
+
 PCIE DRIVER FOR MEDIATEK
 M:	Ryder Lee <ryder.lee@mediatek.com>
 M:	Jianjun Wang <jianjun.wang@mediatek.com>