ethdev: fix stats query for lowest xstat id

ethdev: fix stats query for lowest xstat id

When querying either the name or the value of a stat using the xstats
APIs, a check is done to see if the regular stats API or the xstats APIs
for the driver need to be used. However, the id of the stat requested is
checked to see if it is greater than the number of basic stats, rather
than checking for greater-or-equal, meaning that the xstat with the lowest
id gets incorrectly treated as a basic stat.

This problem manifests itself when you call proc_info using "--xstats-id"
for the first xstat, you get no name of the stat printed, and a random(ish)
stat value.

Fixes: 4773152f850b ("ethdev: optimize xstats by ids APIs")

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>