ARM: dts: am437x-sk-evm: Add sleep pin settings for mcasp1

When McASP is not in use the pins can be put to sleep mode to conserve
power.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
1 file changed