i.MX6Q/DL's WDOGs use IMX6QDL_CLK_IPG as clock root, assign
IMX6QDL_CLK_IPG to them instead of IMX6QDL_CLK_DUMMY.
Signed-off-by: NAnson Huang <Anson.Huang@nxp.com>
Reviewed-by: NDong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>