build-data: Common makefile for NXP DPAA1/DPAA2 platforms

build-data: Common makefile for NXP DPAA1/DPAA2 platforms

 - Same makefile will be used to support DPAA1 and DPAA2 platforms.
 - Support added to have both on Host compilation as well as Cross compilation.
 - If Cross compiling, by default NXP cutomized toolchain "aarch64-fsl-linux" will be used.
   To use Linaro toolchains, please set env variable CROSS_PREFIX.
   Like: export CROSS_PREFIX=aarch64-linux-gnu

 - Added CPU_MTUNE to modify xxx_mtune , if CPU is not A72 which is default.
 - You may set DPDK_PATH to dpdk installation folder, if wish to use locally compiled DPDK.
 - In case of Cross compilation, OPENSSL_PATH will be required to include OPENSSL libs.

Change-Id: I9057dfc57522b60e306810f684b3085bfccf85e9
Signed-off-by: Sachin Saxena <sachin.saxena@nxp.com>