LU-1537 libcfs: 64-bit values are l64 on powerpc

LU-1537 libcfs: 64-bit values are l64 on powerpc

The Linux kernel defines 64-bit values as 'long' rather than 'long long'
for user space applications on powerpc. Previously Lustre would assume
64-bit values were 'long long', which would cause compilation errors for
user space application when compiled on powerpc machines. This change
removes this assumption, correctly defining 64-bit types on powerpc.

Signed-off-by: Prakash Surya <surya1@llnl.gov>
Change-Id: I99f210e9402d3b2aea1a1ee5458b670387f65323
Reviewed-on: http://review.whamcloud.com/3127
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>