Correct SPL use of FSL_CAAM

This converts 1 usage of this option to the non-SPL form, since there is
no SPL_FSL_CAAM defined in Kconfig

Signed-off-by: Simon Glass <sjg@chromium.org>

board/traverse/ten64/ten64.c

@@ -123,7 +123,7 @@ int board_init(void)
 {
 	init_final_memctl_regs();
 
-	if (CONFIG_IS_ENABLED(FSL_CAAM))
+	if (IS_ENABLED(CONFIG_FSL_CAAM))
 		sec_init();
 
 	return 0;