add aligned(4) for cdc_line_coding_t

Author: hathach

src/class/cdc/cdc_device.c

@@ -53,7 +53,7 @@ typedef struct
 
   /*------------- From this point, data is not cleared by bus reset -------------*/
   char    wanted_char;
-  CFG_TUSB_MEM_ALIGN cdc_line_coding_t line_coding;
+  TU_ATTR_ALIGNED(4) cdc_line_coding_t line_coding;
 
   // FIFO
   tu_fifo_t rx_ff;

src/class/cdc/cdc_host.c

@@ -58,8 +58,8 @@ typedef struct {
   cdc_acm_capability_t acm_capability;
   uint8_t ep_notif;
 
-  cdc_line_coding_t line_coding;  // Baudrate, stop bits, parity, data width
-  uint8_t line_state;             // DTR (bit0), RTS (bit1)
+  uint8_t line_state;                               // DTR (bit0), RTS (bit1)
+  TU_ATTR_ALIGNED(4) cdc_line_coding_t line_coding; // Baudrate, stop bits, parity, data width
 
   tuh_xfer_cb_t user_control_cb;