doc: refer PMD compile/test section from ark guide
doc: refer PMD compile/test section from ark guide

Refer the section which explains driver compilation and running of
testpmd in Linux, instead of describing it in driver documentation.

Signed-off-by: Shijith Thotton <b626eae3511cbfeabd3e9761485b9c38aa2c7334@caviumnetworks.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk