net/dpaa2: fix build with timesync functions

net/dpaa2: fix build with timesync functions

Some timesync related source files are built only when
'RTE_LIBRTE_IEEE1588' config is set, which is missing in meson.

Building with '-DRTE_LIBRTE_IEEE1588' cflag will enable timesync
functionality in the files that are build, but it won't build files
that require 'RTE_LIBRTE_IEEE1588' config.
This causes the build error.

Fixing by removing config check in meson file and build all .c files by
default, but wrap relevant code part with 'RTE_LIBRTE_IEEE1588' macro.

Also removing 'RTE_LIBRTE_IEEE1588' ifdef around some fields of the data
structures, to not require finer grained macro wraps on the functions
using them.
Since the registration of the function disabled with macro check, having
functions compiled shouldn't affect the functionality.

Fixes: 184c39d16568 ("net/dpaa2: add DPRTC sub-module")
Cc: stable@dpdk.org
Signed-off-by: Chenxu Di <chenxux.di@intel.com>
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Sachin Saxena <sachin.saxena@oss.nxp.com>