[PATCH] IA64: better calculate PT_LOAD segment size

[Jay Lan]

This patch combines consecutive PL_LOAD segments into one.
The end address of the last PL_LOAD segment, calculated by
adding p_memsz to p_paddr & rounded up to ELF_PAGE_SIZE,
will be the end address of this loaded_segments[] entry.

This patch fixes the kdump kernel MCA problem caused by under-
allocation of memory and a "kdump broken on ALtix 350" problem
reported by Bernhard Walle.

Simon, this patch replaces my previous patch I submitted on the
underallocation issue.

Signed-off-by: Jay Lan <jlan at sgi.com>

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