linux-phytec-ti

rlimits: add rlimit64 structure

Add a platform independent structure for resource limits to use with
a new prlimit64 syscall. This structure is the same which uses glibc
for 64-bit limits.

Also add corresponding infinity which is a 64-bit full of bit-ones.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>