[IA64] clean up pal_emul.c compiler warnings

[IA64] clean up pal_emul.c compiler warnings

This patch cleans up some compiler warnings in pal_emul.c.  The
problem was that a struct ia64_pal_retval was being used to return
the results from emulated PAL calls, but not all of the fields
were being initialized.  Given that fields were not initialized,
I was also thinking that there might be a remote chance of data
leaking between vcpu's -- but I haven't convinced myself that
that could actually happen.

Signed-off-by: Al Stone <ahs3@fc.hp.com>
[whitespace and line wrapping cleanup throughout file]
Signed-off-by: Alex Williamson <alex.williamson@hp.com>