Fix broken compilation for non-numa aware platforms

Fix broken compilation for non-numa aware platforms

 - The dpdk plugin always looks for libnuma library during compilation.
   For non-numa aware platforms compilation breaks, if third party
   libnuma lib is not available.
 - Issue is more severe with Cross Compilation scenario where one has to
   download and cross compile libnuma-dev package even when target platofrom
   is NUMA disabled.
   Like when cross compiling for ARM platforms, Linaro tool-chain doesn't have
   libnuma by default.

Change-Id: Ib85b3188b787c23ba33b47e3f6123c74fd37190e
Signed-off-by: Sachin Saxena <sachin.saxena@nxp.com>