imx: mx6sx: Disable ENET clock before switching clock parent

Need to gate ENET clock when switching to a new clock parent, because
the mux is not glitchless.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ye.Li <ye.li@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
1 file changed