ARMv8/LS2085A: HugeTLB support is required by default in LS NADK

LS NADK memory manager by default works on HugeTLB. Hence bootargs
must include parameters default_hugepagesz (default hugepagesize,
hugepagesz (hugepage size) and hugepages (number of hugepages to be
reserved in kernel for the given size).

Signed-off-by: Kuldip Giroh <kuldip.giroh@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>