Refactoring and comment adding

bootloader/main.c

@@ -1263,7 +1263,8 @@ void ipl_main()
 	// Save sdram lp0 config.
 	if (!ianos_loader(false, "bootloader/sys/libsys_lp0.bso", DRAM_LIB, (void *)sdram_get_params_patched()))
 		h_cfg.errors |= ERR_LIBSYS_LP0;
-		
+
+	// Train DRAM and switch to max frequency.
 	minerva_init();
 	minerva_change_freq(FREQ_1600);