net: ti: am65-cpsw-nuss: Prepare to support non primary ext port

CPSW NUSS IP on K3 SoCs can have more than one external port (upto 8)
Therefore increase AM65_CPSW_CPSWNU_MAX_PORTS to 9 (8 ext + 1 Root port)
as preparation to allow any one of the 8 ports to be used as ethernet
interface in U-Boot.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
diff --git a/drivers/net/ti/am65-cpsw-nuss.c b/drivers/net/ti/am65-cpsw-nuss.c
index e6954b6..9f11ce6 100644
--- a/drivers/net/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ti/am65-cpsw-nuss.c
@@ -26,7 +26,7 @@
 
 #include "cpsw_mdio.h"
 
-#define AM65_CPSW_CPSWNU_MAX_PORTS 2
+#define AM65_CPSW_CPSWNU_MAX_PORTS 9
 
 #define AM65_CPSW_SS_BASE		0x0
 #define AM65_CPSW_SGMII_BASE	0x100