tty: serial: samsung: Use BIT() macro for APPLE_S5L_*

New entries using BIT() will be added soon, so change the existing ones
for consistency.

Signed-off-by: Nick Chan <towinchenmi@gmail.com>

Author: asdfugil

include/linux/serial_s3c.h

@@ -249,9 +249,9 @@
 #define APPLE_S5L_UCON_RXTO_ENA		9
 #define APPLE_S5L_UCON_RXTHRESH_ENA	12
 #define APPLE_S5L_UCON_TXTHRESH_ENA	13
-#define APPLE_S5L_UCON_RXTO_ENA_MSK	(1 << APPLE_S5L_UCON_RXTO_ENA)
-#define APPLE_S5L_UCON_RXTHRESH_ENA_MSK	(1 << APPLE_S5L_UCON_RXTHRESH_ENA)
-#define APPLE_S5L_UCON_TXTHRESH_ENA_MSK	(1 << APPLE_S5L_UCON_TXTHRESH_ENA)
+#define APPLE_S5L_UCON_RXTO_ENA_MSK	BIT(APPLE_S5L_UCON_RXTO_ENA)
+#define APPLE_S5L_UCON_RXTHRESH_ENA_MSK	BIT(APPLE_S5L_UCON_RXTHRESH_ENA)
+#define APPLE_S5L_UCON_TXTHRESH_ENA_MSK	BIT(APPLE_S5L_UCON_TXTHRESH_ENA)
 
 #define APPLE_S5L_UCON_DEFAULT		(S3C2410_UCON_TXIRQMODE | \
 					 S3C2410_UCON_RXIRQMODE | \
@@ -260,9 +260,9 @@
 					 APPLE_S5L_UCON_RXTHRESH_ENA_MSK | \
 					 APPLE_S5L_UCON_TXTHRESH_ENA_MSK)
 
-#define APPLE_S5L_UTRSTAT_RXTHRESH	(1<<4)
-#define APPLE_S5L_UTRSTAT_TXTHRESH	(1<<5)
-#define APPLE_S5L_UTRSTAT_RXTO		(1<<9)
+#define APPLE_S5L_UTRSTAT_RXTHRESH	BIT(4)
+#define APPLE_S5L_UTRSTAT_TXTHRESH	BIT(5)
+#define APPLE_S5L_UTRSTAT_RXTO		BIT(9)
 #define APPLE_S5L_UTRSTAT_ALL_FLAGS	(0x3f0)
 
 #ifndef __ASSEMBLY__