net: stmmac: Add support for EST cycle-time-extension

Add support for cycle-time-extension. TER GCL-register needs to be
updated with the cycle-time-extension. Width of TER register is EST
time interval width + 7 bits.
Signed-off-by: Rohan G Thomas <rohan.g.thomas@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231201055252.1302-4-rohan.g.thomas@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c

@@ -975,6 +975,8 @@ static int tc_setup_taprio(struct stmmac_priv *priv,
 		return -EINVAL;
 	if (!qopt->cycle_time)
 		return -ERANGE;
+	if (qopt->cycle_time_extension >= BIT(wid + 7))
+		return -ERANGE;
 
 	if (!plat->est) {
 		plat->est = devm_kzalloc(priv->device, sizeof(*plat->est),
@@ -1041,6 +1043,8 @@ static int tc_setup_taprio(struct stmmac_priv *priv,
 	priv->plat->est->ctr[0] = do_div(ctr, NSEC_PER_SEC);
 	priv->plat->est->ctr[1] = (u32)ctr;
 
+	priv->plat->est->ter = qopt->cycle_time_extension;
+
 	if (fpe && !priv->dma_cap.fpesel) {
 		mutex_unlock(&priv->plat->est->lock);
 		return -EOPNOTSUPP;