char: pcmcia: cm4000_cs: Remove unused variable 'tmp'

Fixes the following W=1 kernel build warning(s):

 drivers/char/pcmcia/cm4000_cs.c: In function ‘cmm_write’:
 drivers/char/pcmcia/cm4000_cs.c:1053:16: warning: variable ‘tmp’ set but not used [-Wunused-but-set-variable]

Cc: Harald Welte <laforge@gnumonks.org>
Cc: "cs.c" <support.linux@omnikey.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210520121347.3467794-2-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/char/pcmcia/cm4000_cs.c

@@ -1050,7 +1050,6 @@ static ssize_t cmm_write(struct file *filp, const char __user *buf,
 	struct cm4000_dev *dev = filp->private_data;
 	unsigned int iobase = dev->p_dev->resource[0]->start;
 	unsigned short s;
-	unsigned char tmp;
 	unsigned char infolen;
 	unsigned char sendT0;
 	unsigned short nsend;
@@ -1148,7 +1147,7 @@ static ssize_t cmm_write(struct file *filp, const char __user *buf,
 	set_cardparameter(dev);
 
 	/* dummy read, reset flag procedure received */
-	tmp = inb(REG_FLAGS1(iobase));
+	inb(REG_FLAGS1(iobase));
 
 	dev->flags1 = 0x20	/* T_Active */
 	    | (sendT0)