soc: ti: k3-socinfo: Add entry for J721S2 SoC

Add support for J721S2 SoC identification.

Signed-off-by: David Huang <d-huang@ti.com>
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
diff --git a/drivers/soc/soc_ti_k3.c b/drivers/soc/soc_ti_k3.c
index 9abed7d..c8f7a57 100644
--- a/drivers/soc/soc_ti_k3.c
+++ b/drivers/soc/soc_ti_k3.c
@@ -14,6 +14,7 @@
 #define J721E			0xbb64
 #define J7200			0xbb6d
 #define AM64X			0xbb38
+#define J721S2			0xbb75
 
 #define REV_SR1_0		0
 #define REV_SR2_0		1
@@ -48,6 +49,9 @@
 	case AM64X:
 		family = "AM64X";
 		break;
+	case J721S2:
+		family = "J721S2";
+		break;
 	default:
 		family = "Unknown Silicon";
 	};