LU-7734 lnet: power8 compile fix

LU-7734 lnet: power8 compile fix

On Power8 the following error occured:

error: inlining failed in call to always_inline ‘lnet_get_numa_range’:
function body not available inline __u32 lnet_get_numa_range(void);

The reason for this was for the linux kernel you
must fill in the body of a inline function. Replace
this inline function with exposing the lnet_numa_range
module parameter like we do for portal_rotor. Also
treat all the lnet_numa_range handling as unsigned int.

Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Signed-off-by: Olaf Weber <olaf@sgi.com>
Change-Id: Ic566e56eb1e333d145de21d1c197218c6425dc5b
Reviewed-on: http://review.whamcloud.com/21078
Reviewed-by: Amir Shehata <amir.shehata@intel.com>
Tested-by: Amir Shehata <amir.shehata@intel.com>