spi: loopback-test: fix spelling mistake: "minimam" -> "minimum"

trivial fix to spelling mistake in dev_err error message

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/spi-loopback-test.c b/drivers/spi/spi-loopback-test.c
index 6888d5c..e604153 100644
--- a/drivers/spi/spi-loopback-test.c
+++ b/drivers/spi/spi-loopback-test.c
@@ -520,7 +520,7 @@ static int spi_test_check_elapsed_time(struct spi_device *spi,
 	estimated_time += delay_usecs * NSEC_PER_USEC;
 	if (test->elapsed_time < estimated_time) {
 		dev_err(&spi->dev,
-			"elapsed time %lld ns is shorter than minimam estimated time %lld ns\n",
+			"elapsed time %lld ns is shorter than minimum estimated time %lld ns\n",
 			test->elapsed_time, estimated_time);
 
 		return -EINVAL;