hos: exo: better fatal description for boot2

bootloader/hos/secmon_exo.c

@@ -438,7 +438,7 @@ void secmon_exo_check_panic()
 
 	// Check if mixed atmosphere sysmodules.
 	if ((u32)rpt->title_id == HOS_PID_BOOT2)
-		WPRINTF("Is fss0 path correct?\n");
+		WPRINTF("fss0 wrong path or mismatched atmo files\n");
 
 	// Save context to the SD card.
 	char filepath[0x40];