net: macb: Add PTP support to EMAC for sama7g5

Add PTP capability to the Ethernet MAC.
Signed-off-by: NDurai Manickam KR <durai.manickamkr@microchip.com>
Reviewed-by: NClaudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: NMichal Swiatkowski <michal.swiatkowski@linux.intel.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/cadence/macb_main.c

@@ -4853,7 +4853,8 @@ static const struct macb_config sama7g5_gem_config = {
 
 static const struct macb_config sama7g5_emac_config = {
 	.caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII |
-		MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_MIIONRGMII,
+		MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_MIIONRGMII |
+		MACB_CAPS_GEM_HAS_PTP,
 	.dma_burst_length = 16,
 	.clk_init = macb_clk_init,
 	.init = macb_init,