NS16550: trivial code clean for checkpatch

This removes most checkpatch warnings from the ns16550 driver and its
header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/ns16550.h b/include/ns16550.h
index 51f1c17..e9d2eda 100644
--- a/include/ns16550.h
+++ b/include/ns16550.h
@@ -65,12 +65,12 @@
 #define dll rbr
 #define dlm ier
 
-typedef volatile struct NS16550 *NS16550_t;
+typedef struct NS16550 *NS16550_t;
 
 /*
  * These are the definitions for the FIFO Control Register
  */
-#define UART_FCR_FIFO_EN 	0x01 /* Fifo enable */
+#define UART_FCR_FIFO_EN	0x01 /* Fifo enable */
 #define UART_FCR_CLEAR_RCVR	0x02 /* Clear the RCVR FIFO */
 #define UART_FCR_CLEAR_XMIT	0x04 /* Clear the XMIT FIFO */
 #define UART_FCR_DMA_SELECT	0x08 /* For DMA applications */
@@ -106,7 +106,7 @@
 #define UART_LCR_WLS_6	0x01		/* 6 bit character length */
 #define UART_LCR_WLS_7	0x02		/* 7 bit character length */
 #define UART_LCR_WLS_8	0x03		/* 8 bit character length */
-#define UART_LCR_STB	0x04		/* Number of stop Bits, off = 1, on = 1.5 or 2) */
+#define UART_LCR_STB	0x04		/* # stop Bits, off=1, on=1.5 or 2) */
 #define UART_LCR_PEN	0x08		/* Parity eneble */
 #define UART_LCR_EPS	0x10		/* Even Parity Select */
 #define UART_LCR_STKP	0x20		/* Stick Parity */
@@ -162,8 +162,8 @@
 /* useful defaults for LCR */
 #define UART_LCR_8N1	0x03
 
-void	NS16550_init   (NS16550_t com_port, int baud_divisor);
-void	NS16550_putc   (NS16550_t com_port, char c);
-char	NS16550_getc   (NS16550_t com_port);
-int	NS16550_tstc   (NS16550_t com_port);
-void	NS16550_reinit (NS16550_t com_port, int baud_divisor);
+void NS16550_init(NS16550_t com_port, int baud_divisor);
+void NS16550_putc(NS16550_t com_port, char c);
+char NS16550_getc(NS16550_t com_port);
+int NS16550_tstc(NS16550_t com_port);
+void NS16550_reinit(NS16550_t com_port, int baud_divisor);