lib/crc7: Shift crc7() output left 1 bit

This eliminates a 1-bit left shift in every single caller,
and makes the inner loop of the CRC computation more efficient.

Renamed crc7 to crc7_be (big-endian) since the interface changed.

Also purged #include <linux/crc7.h> from files that don't use it at all.

Signed-off-by: George Spelvin <linux@horizon.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ti/wl1251/acx.c

@@ -2,7 +2,6 @@
 
 #include <linux/module.h>
 #include <linux/slab.h>
-#include <linux/crc7.h>
 
 #include "wl1251.h"
 #include "reg.h"

drivers/net/wireless/ti/wl1251/cmd.c

@@ -2,7 +2,6 @@
 
 #include <linux/module.h>
 #include <linux/slab.h>
-#include <linux/crc7.h>
 #include <linux/etherdevice.h>
 
 #include "wl1251.h"

drivers/net/wireless/ti/wl1251/spi.c

@@ -122,8 +122,7 @@ static void wl1251_spi_wake(struct wl1251 *wl)
 	crc[3] = cmd[6];
 	crc[4] = cmd[5];
 
-	cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
-	cmd[4] |= WSPI_INIT_CMD_END;
+	cmd[4] = crc7_be(0, crc, WSPI_INIT_CMD_CRC_LEN) | WSPI_INIT_CMD_END;
 
 	t.tx_buf = cmd;
 	t.len = WSPI_INIT_CMD_LEN;

drivers/net/wireless/ti/wlcore/spi.c

@@ -151,8 +151,7 @@ static void wl12xx_spi_init(struct device *child)
 	crc[3] = cmd[6];
 	crc[4] = cmd[5];
 
-	cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
-	cmd[4] |= WSPI_INIT_CMD_END;
+	cmd[4] = crc7_be(0, crc, WSPI_INIT_CMD_CRC_LEN) | WSPI_INIT_CMD_END;
 
 	t.tx_buf = cmd;
 	t.len = WSPI_INIT_CMD_LEN;