drivers: dac: esp32: fix clock control subsys argument

Current cfg->clock_subsys is passed as address and is
causing driver assertion.

Fixes #69198

Signed-off-by: Sylvio Alves <sylvio.alves@espressif.com>
(cherry picked from commit a79c54dc43f4b40f13331df0de8c0d6dc0f403ba)
1 file changed