drivers/spi/tpm: Clean up SPI TPM driver

1. Move common TIS macros to include/tpm.h.
2. Use common TIS macros while referring to status and access registers.
3. Add a new function claim_locality to properly check for required
access bits and claim locality 0.

BUG=b:36873582

Change-Id: I11bf3e8b6e1f50b7868c9fe4394a858488367287
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/19213
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/drivers/i2c/tpm/cr50.c

@@ -39,6 +39,7 @@
 #include <device/i2c.h>
 #include <endian.h>
 #include <timer.h>
+#include <tpm.h>
 #include "tpm.h"
 
 #if IS_ENABLED(CONFIG_ARCH_X86)