drivers: net: vsc9953: Fix number of reserved registers

There are only 21 registers reserved between ana_ana and
ana_pgid register groups.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@freescale.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
1 file changed