fixed some compiler warnings

sys/sysinit.c

@@ -1061,8 +1061,6 @@ void clear_bss_segment(void)
 
 void initialize_hardware(void)
 {
-	bool coldboot = true;
-
 	/* Test for FireTOS switch: DIP switch #5 up */
 #ifdef MACHINE_FIREBEE
 	if (!(DIP_SWITCH & (1 << 6))) {
@@ -1181,7 +1179,7 @@ void initialize_hardware(void)
 
 	init_slt();
 	init_fbcs();
-	coldboot = init_ddram();
+    init_ddram();
 
 	/*
 	 * install (preliminary) exception vectors
@@ -1227,8 +1225,6 @@ void initialize_hardware(void)
 	}
 
 #if MACHINE_FIREBEE
-	if (coldboot) /* does not work with BDM */
-		;
 	fpga_configured = init_fpga();
 
 	init_pll();