userspace/libswitchhw: fixed warnings

userspace/libswitchhw/fpga_io.c

@@ -39,12 +39,6 @@ int shw_fpga_mmap_init()
 
 }
 
-int shw_main_fpga_init()
-{
-  shw_pio_configure(PIN_main_fpga_nrst);
-  shw_main_fpga_reset();
-}
-
 void shw_main_fpga_reset()
 {
     shw_pio_set0(PIN_main_fpga_nrst);
@@ -53,3 +47,8 @@ void shw_main_fpga_reset()
     usleep(10000);
 }
 
+int shw_main_fpga_init()
+{
+  shw_pio_configure(PIN_main_fpga_nrst);
+  shw_main_fpga_reset();
+}

userspace/libswitchhw/fpgaboot.c

@@ -243,7 +243,7 @@ static int uncompress_and_boot_fpga(int fpga_id, struct fpga_image_entry  *ent)
 int shw_boot_fpga(int fpga_id)
 {
   char *fw_name;
-  char *fpga_name;
+  const char *fpga_name;
   int rev_id;
   uint32_t fw_hash;
   struct fpga_image_entry ent;

userspace/libswitchhw/xpoint.c

@@ -186,12 +186,10 @@ static void adn4600_write_reg(uint8_t reg, uint8_t value)
   if(mi2c_put_byte(value)) goto txerr;
 
   mi2c_stop();
-  return 0;
 
  txerr:
   TRACE(TRACE_FATAL, "No I2C ack from ADN4600!");
   mi2c_stop();
-  return 0;
 }