[Midnightbsd-cvs] src: mpu401.c: Use constant for callout_init's mpsafe check

[laffer1 at midnightbsd.org]

Log Message:
-----------
Use constant for callout_init's mpsafe check

Modified Files:
--------------
    src/sys/dev/sound/midi:
        mpu401.c (r1.1.1.1 -> r1.2)
        (http://cvsweb.midnightbsd.org/src/sys/dev/sound/midi/mpu401.c?r1=1.1.1.1&r2=1.2)