vppinfra: remove linux/syscall.h

For portabiliy reasons it is better to have all wrapped in clib code.
I.e. instead of using getcpu() we have clib_get_current_numa_node () and
clib_get_current_cpu_id().

Type: refactor
Change-Id: I29b52d7f29bc7f93873402c4070561f564b71c63
Signed-off-by: Damjan Marion <damarion@cisco.com>

extras/scripts/build_static_vppctl.sh

@@ -11,8 +11,6 @@ ${CC:-cc} \
  -static \
  -I ${src} \
  -I ${tmp} \
- -DHAVE_MEMFD_CREATE \
- -DHAVE_GETCPU \
  ${src}/vppinfra/backtrace.c \
  ${src}/vppinfra/dlmalloc.c \
  ${src}/vppinfra/elf.c \