ARM: at91: sama5d35ek.dts: fix ssc enumeration

SSC0 is always enabled even if sound is not used.
So switch to the "okay" status in sama5d35ek.dts SSC0 node.

Reported-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
ARM: at91: sama5d3xmb.dtsi: make sure that sound status is disabled

Sound should be enabled at board level, so keep it "disabled" for this generic
file.
It does not change the current behavior because sama5d3[134]ek.dts files are
already enabling sound explicitly.

Reported-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>