timer: option --vmware-tsc-map for VMware guest

timer: option --vmware-tsc-map for VMware guest

The VMWare TSC mapping uses a hook to RDPMC to read the physical TSC
in the case of VMware ESXi.

Signed-off-by: Damien Millescamps <damien.millescamps@6wind.com>
Acked-by: Jean-Mickael Guerin <jmg@6wind.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
Introduce new option --vmware-tsc-map, ignored if
CONFIG_RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set.

Default is CONFIG_RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT=y.

if CONFIG_RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is set:
    rte_rdtsc() selects at runtime between Vmware mapping of
    TSC or native TSC
else
    rte_rdtsc() always uses native rdtsc.

When running DPDK on VMware guest, enable --vmware-tsc-map to
read the physical TSC.
Caution: ESXi should pass monitor_control.pseudo_perfctr = TRUE
othewise it results in general protection fault.

Signed-off-by: Jean-Mickael Guerin <jean-mickael.guerin@6wind.com>
Acked-by: Vincent Jardin <vincent.jardin@6wind.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>