ARM: dts: i.MX51: Add dummy clock to AUDMUX

This patch adds dummy clock for AUDMUX. This change avoids useless
debug message "cannot get clock" during driver initialization.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
1 file changed