[PATCH 1/2] module.c: fix module loading failure of large modules

When creating the final layout of a kernel module in memory, allow the
module loader to reserve some additional memory behind a given section.
This is currently only needed for the parisc port which needs to put the
stub entries there to fulfill the 17/22bit PCREL relocations with large
kernel modules like xfs.

Signed-off-by: Helge Deller <deller@gmx.de>