soc/intel/common: Delete the TBT authenticaton function

Delete the Thunderbolt authentication function ioe_tcss_valid_tbt_auth
from the common block. Meteor Lake Platform will implement it.

BUG=b:213574324
TEST=Built coreboot image successfully.

Change-Id: I97a289faa6351fe562f91d8478b72c9403ce88cb
Signed-off-by: John Zhao <john.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66416
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tarun Tuli <taruntuli@google.com>

src/soc/intel/common/block/tcss/tcss.c

@@ -439,8 +439,3 @@ bool tcss_valid_tbt_auth(void)
 {
 	return REGBAR32(PID_IOM, IOM_CSME_IMR_TBT_STATUS) & TBT_VALID_AUTHENTICATION;
 }
-
-bool ioe_tcss_valid_tbt_auth(void)
-{
-	return ioe_p2sb_sbi_read(PID_IOM, IOM_CSME_IMR_TBT_STATUS) & TBT_VALID_AUTHENTICATION;
-}