mISDN: Fix irq detection
mISDN: Fix irq detection

Fix false irq detection on disabled irqs.

Signed-off-by: Andreas Eversberg <b15c342f1de186996bcca5e1a23cd684d2fadb32@eversberg.eu>
Signed-off-by: Karsten Keil <90bd3ab5dfafb0210c2bd99c94885684b79eea73@suse.de>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas