MAINTAINERS: Add Lucas Stach as co-maintainer for i.MX6 PCI driver

Also drop Shawn Guo per his request.

Signed-off-by: Lucas Stach <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Acked-by: Shawn Guo <[email protected]>
Acked-by: Richard Zhu <[email protected]>
Acked-by: Jingoo Han <[email protected]>
diff --git a/MAINTAINERS b/MAINTAINERS
index 1ff06de..db66575 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6870,7 +6870,7 @@
 
 PCI DRIVER FOR IMX6
 M:	Richard Zhu <[email protected]>
-M:	Shawn Guo <[email protected]>
+M:	Lucas Stach <[email protected]>
 L:	[email protected]
 L:	[email protected] (moderated for non-subscribers)
 S:	Maintained