ti: common: board_detect: Replace hardcoded value with macro

We should have used TI_DEAD_EEPROM_MAGIC in the first place.

Fixes: d3b98a9eb941 ("ti: common: dra7: Add standard access for board description EEPROM")
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/ti/common/board_detect.c b/board/ti/common/board_detect.c
index e0ae1a5..7c552d2 100644
--- a/board/ti/common/board_detect.c
+++ b/board/ti/common/board_detect.c
@@ -171,7 +171,7 @@
 		goto already_read;
 
 	/* Initialize with a known bad marker for i2c fails.. */
-	ep->header = 0xADEAD12C;
+	ep->header = TI_DEAD_EEPROM_MAGIC;
 	ep->name[0] = 0x0;
 	ep->version[0] = 0x0;
 	ep->serial[0] = 0x0;