Fix trivial spelling error

BUG=None
TEST=build, boot, gets to login screen
BRANCH=None

Change-Id: I8b77999710624c89fefc5f0c2ec28c8aa1e1fb35
Signed-off-by: Ronald G. Minnich <rminnich@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/65636
diff --git a/src/drivers/tpm/slb9635_i2c/tpm_tis_i2c.c b/src/drivers/tpm/slb9635_i2c/tpm_tis_i2c.c
index f928238..c2c10bf 100644
--- a/src/drivers/tpm/slb9635_i2c/tpm_tis_i2c.c
+++ b/src/drivers/tpm/slb9635_i2c/tpm_tis_i2c.c
@@ -169,7 +169,7 @@
 	int rc = 0;
 	int count;
 
-	if (len > TPM_BUF_SIZE) {
+	if (len > TPM_BUFSIZE) {
 		printf("%s: Length %d is too large\n", __func__, len);
 		return -1;
 	}