sound: irq: Remove IRQF_DISABLED

sound: irq: Remove IRQF_DISABLED

Since commit [e58aa3d2: genirq: Run irq handlers with interrupts disabled],
We run all interrupt handlers with interrupts disabled
and we even check and yell when an interrupt handler
returns with interrupts enabled (see commit [b738a50a:
genirq: Warn when handler enables interrupts]).

So now this flag is a NOOP and can be removed.

Signed-off-by: Yong Zhang <[email protected]>
Acked-by: Peter Ujfalusi <[email protected]>
Acked-by: Mark Brown <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>