6501187 sun4v interrupt trap handler should check for spurious interrupts

[govinda.ta...@sun.com]

Author: govinda
Repository: /hg/onnv/onnv-gate
Revision: 19403aad55ecdb8b16391057b57976b1f4fe259e
Log message:
6501187 sun4v interrupt trap handler should check for spurious interrupts

Files:
        update: usr/src/uts/sun4v/ml/mach_interrupt.s