drivers/i2c/tpm: Fix issues detected by checkpatch

Fix the following warnings detected by checkpatch.pl:

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
WARNING: braces {} are not necessary for single statement blocks
WARNING: Unnecessary parentheses - maybe == should be = ?
WARNING: line over 80 characters
WARNING: missing space after return type

TEST=Build and run on Galileo Gen2

Change-Id: I56f915f6c1975cce123fd38043bad2638717d88c
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18832
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/drivers/i2c/tpm/cr50.c b/src/drivers/i2c/tpm/cr50.c
index 0877de0..42c82d6 100644
--- a/src/drivers/i2c/tpm/cr50.c
+++ b/src/drivers/i2c/tpm/cr50.c
@@ -438,7 +438,7 @@
 		       __func__, CR50_TIMEOUT_NOIRQ_MS);
 }
 
-int tpm_vendor_probe(unsigned bus, uint32_t addr)
+int tpm_vendor_probe(unsigned int bus, uint32_t addr)
 {
 	struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev);
 	struct tpm_chip probe_chip;
@@ -475,7 +475,7 @@
 	return 0;
 }
 
-int tpm_vendor_init(struct tpm_chip *chip, unsigned bus, uint32_t dev_addr)
+int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
 {
 	struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev);
 	uint32_t vendor;