MAINTAINERS: Add CIX Sky1 PCIe controller driver maintainer

Add Hans Zhang as maintainer of the CIX Sky1 PCIe host driver.

Signed-off-by: Hans Zhang <hans.zhang@cixtech.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20251108140305.1120117-9-hans.zhang@cixtech.com

Author: Hans Zhang

MAINTAINERS

@@ -19621,6 +19621,13 @@ S:	Orphan
 F:	Documentation/devicetree/bindings/pci/cdns,*
 F:	drivers/pci/controller/cadence/*cadence*
 
+PCI DRIVER FOR CIX Sky1
+M:	Hans Zhang <hans.zhang@cixtech.com>
+L:	linux-pci@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/pci/cix,sky1-pcie-*.yaml
+F:	drivers/pci/controller/cadence/*sky1*
+
 PCI DRIVER FOR FREESCALE LAYERSCAPE
 M:	Minghuan Lian <minghuan.Lian@nxp.com>
 M:	Mingkai Hu <mingkai.hu@nxp.com>