w1: export w1_read_8 function

Export the w1_read_8 function for use of drivers. The OMAP HDQ
driver(drivers/w1/masters/omap_hdq.c) uses this function.

[[e-mail]: coding-style fixes]
Signed-off-by: Madhusudhan Chikkature<[e-mail]>
Acked-by: Evgeniy Polyakov <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/w1/w1.h

···
 
 u8 w1_triplet(struct w1_master *dev, int bdir);
 void w1_write_8(struct w1_master *, u8);
+u8 w1_read_8(struct w1_master *);
 int w1_reset_bus(struct w1_master *);
 u8 w1_calc_crc8(u8 *, int);
 void w1_write_block(struct w1_master *, const u8 *, int);

drivers/w1/w1_io.c

···
  * @param dev     the master device
  * @return        the byte read
  */
-static u8 w1_read_8(struct w1_master * dev)
+u8 w1_read_8(struct w1_master *dev)
 {
 	int i;
 	u8 res = 0;
···
 
 	return res;
 }
+EXPORT_SYMBOL_GPL(w1_read_8);
 
 /**
  * Writes a series of bytes.