ARM: imx: Add DMAMUX clock for Vybrid vf610 SoC

Signed-off-by: Jingchang Lu <b35083@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

diff --cc arch/arm/mach-imx/clk-vf610.c
Simple merge

diff --cc include/dt-bindings/clock/vf610-clock.h
Simple merge