[PATCH] kdump:

Paul, Please send this to upstream if you are OK with it. Tested this 
one and kdump-dma-fault-fix.patch on P5, P4 (non-lpar), JS21 and JS20.

Thanks
Haren

Some times, the kexec CPU is not reponding to an IPI during kdump boot. 
It is causing the system in xmon. This patch clears and EOI IPI for 
kexec CPU as well before the kdump boot started.

Signed-off-by: Haren Myneni <haren@us.ibm.com>