src/drivers: Fix typo

Change-Id: I9144937b72a98517cbd41c093cff7bad543b4140
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/27916
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/drivers/pc80/tpm/tis.c b/src/drivers/pc80/tpm/tis.c
index 495bb4a..67aff43 100644
--- a/src/drivers/pc80/tpm/tis.c
+++ b/src/drivers/pc80/tpm/tis.c
@@ -743,7 +743,7 @@
 	/* Set TPM interrupt vector */
 	tpm_write_int_vector(vector, locality);
 
-	/* Set TPM interupt polarity and disable interrupts */
+	/* Set TPM interrupt polarity and disable interrupts */
 	tpm_write_int_polarity(polarity, locality);
 
 	/* Close connection if it was opened */