tdx-cfg-block: fix off by one issue

Fix toradex_modules array off by one issue potentially leading to
spurious printout during boot e.g.

    Model: Toradex  V1.2A,

instead of

    Model: Toradex UNKNOWN MODULE V1.2A.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
diff --git a/board/toradex/common/tdx-cfg-block.c b/board/toradex/common/tdx-cfg-block.c
index 2fcb998..b90077b 100644
--- a/board/toradex/common/tdx-cfg-block.c
+++ b/board/toradex/common/tdx-cfg-block.c
@@ -261,7 +261,7 @@
 	}
 
 	/* Cap product id to avoid issues with a yet unknown one */
-	if (tdx_hw_tag.prodid > (sizeof(toradex_modules) /
+	if (tdx_hw_tag.prodid >= (sizeof(toradex_modules) /
 				  sizeof(toradex_modules[0])))
 		tdx_hw_tag.prodid = 0;