mmc: davinci_mmc: Drop dangling variable

The sg_miter conversion left a dangling unused variable.
Drop it.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402142042.vg0lnLdb-lkp@intel.com/
Fixes: ed01d210 ("mmc: davinci_mmc: Use sg_miter for PIO")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20240215-mmc-fix-davinci-v1-1-a593678ca7bf@linaro.orgSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/davinci_mmc.c

@@ -211,7 +211,6 @@ static void davinci_fifo_data_trans(struct mmc_davinci_host *host,
 					unsigned int n)
 {
 	struct sg_mapping_iter *sgm = &host->sg_miter;
-	size_t sglen;
 	u8 *p;
 	unsigned int i;
 
@@ -224,7 +223,6 @@ static void davinci_fifo_data_trans(struct mmc_davinci_host *host,
 		return;
 	}
 	p = sgm->addr;
-	sglen = sgm->length;
 
 	/* NOTE:  we never transfer more than rw_threshold bytes
 	 * to/from the fifo here; there's no I/O overlap.