ddr: marvell: a38x: debug: Allow compiling with immutable debug settings to reduce binary size

Allow compiling with immutable debug settings:
- DEBUG_LEVEL is always set to DEBUG_LEVEL_ERROR
- register dumps are disabled

This can save around 10 KiB of space in the resulting binary, which is a
lot in U-Boot SPL.

Signed-off-by: Marek Behún <kabel@kernel.org>

drivers/ddr/marvell/a38x/ddr3_init.c

@@ -41,7 +41,8 @@ int ddr3_init(void)
 	mv_ddr_pre_training_soc_config(ddr_type);
 
 	/* Set log level for training library */
-	mv_ddr_user_log_level_set(DEBUG_BLOCK_ALL);
+	if (!IS_ENABLED(CONFIG_DDR_IMMUTABLE_DEBUG_SETTINGS))
+		mv_ddr_user_log_level_set(DEBUG_BLOCK_ALL);
 
 	mv_ddr_early_init();