clk: meson: axg: spread spectrum is on mpll2

After testing, it appears that the SSEN bit controls the spread
spectrum function on MPLL2, not MPLL0.

Fixes: 78b4af312f91 ("clk: meson-axg: add clock controller drivers")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
1 file changed