The Amlogic Meson GX SoCs needs these two clocks to power up the
VPU power domain.

These two clocks are similar to the MALI clocks by having a glitch-free
mux and two similar clocks with gate, divider and muxes.
Acked-by: Jerome Brunet <jbrunet@baylibre.com>
[narmstrong: removed the CLK_IGNORE_UNUSED on muxes and dividers]
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>