serial: zynq: Use BIT macros instead of shifts and full hex numbers

Coding style is checking to use BIT macros instead of shifts.
The patch is also fixing the rest of macros which should be BITs instead
of hex numbers.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/serial/serial_zynq.c

@@ -15,14 +15,14 @@
 #include <linux/compiler.h>
 #include <serial.h>
 
-#define ZYNQ_UART_SR_TXEMPTY	(1 << 3) /* TX FIFO empty */
-#define ZYNQ_UART_SR_TXACTIVE	(1 << 11)  /* TX active */
-#define ZYNQ_UART_SR_RXEMPTY	0x00000002 /* RX FIFO empty */
-
-#define ZYNQ_UART_CR_TX_EN	0x00000010 /* TX enabled */
-#define ZYNQ_UART_CR_RX_EN	0x00000004 /* RX enabled */
-#define ZYNQ_UART_CR_TXRST	0x00000002 /* TX logic reset */
-#define ZYNQ_UART_CR_RXRST	0x00000001 /* RX logic reset */
+#define ZYNQ_UART_SR_TXEMPTY	BIT(3) /* TX FIFO empty */
+#define ZYNQ_UART_SR_TXACTIVE	BIT(11) /* TX active */
+#define ZYNQ_UART_SR_RXEMPTY	BIT(1) /* RX FIFO empty */
+
+#define ZYNQ_UART_CR_TX_EN	BIT(4) /* TX enabled */
+#define ZYNQ_UART_CR_RX_EN	BIT(2) /* RX enabled */
+#define ZYNQ_UART_CR_TXRST	BIT(1) /* TX logic reset */
+#define ZYNQ_UART_CR_RXRST	BIT(0) /* RX logic reset */
 
 #define ZYNQ_UART_MR_PARITY_NONE	0x00000020  /* No parity mode */