target: msm8909: add serial number support to  NAND device

The serial number buffer is initialized for NAND device of 8909.

Change-Id: Ic560fdbb4239812025f29093d23e56deb51d0c59
Signed-off-by: Saranya Chidura <schidura@codeaurora.org>
diff --git a/include/target.h b/include/target.h
index 52543ef..4cc2812 100644
--- a/include/target.h
+++ b/include/target.h
@@ -28,6 +28,9 @@
 
 #define TARGET_MAX_CMDLNBUF 64
 
+/* Serial Number Length. */
+#define SERIAL_NUMBER_LEN   13
+
 /* Enum for target VB version detection */
 enum
 {