nfs-utils: modify nfsserver init script indent

nfs-utils: modify nfsserver init script indent

Using sysvinit testing service status, nfsserver status
allways display as [?] unknown.

This is because sysvinit package check whether service's
init script supporting status function or not by:
grep -qs "\Wstatus)" "$SERVICE"

So, this commit modified the indent for status etc, as
most service's init script does.

Signed-off-by: Qiang Chen <qiang.chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>