tpm_crb_ffa: Remove unused export

JIRA: https://issues.redhat.com/browse/RHEL-102692

commit 89dd369
Author: Jarkko Sakkinen <jarkko.sakkinen@opinsys.com>
Date: Tue, 1 Jul 2025 03:37:36 +0300

    Remove the export of tpm_crb_ffa_get_interface_version() as it has no
    callers outside tpm_crb_ffa.

    Fixes: eb93f07 ("tpm_crb: ffa_tpm: Implement driver compliant to CRB over FF-A")
    Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@opinsys.com>
    Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
    Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>

Signed-off-by: Marcin Juszkiewicz <mjuszkiewicz@redhat.com>

Author: hrw

drivers/char/tpm/tpm_crb_ffa.c

@@ -214,7 +214,7 @@ static int __tpm_crb_ffa_send_recieve(unsigned long func_id,
  *
  * Return: 0 on success, negative error code on failure.
  */
-int tpm_crb_ffa_get_interface_version(u16 *major, u16 *minor)
+static int tpm_crb_ffa_get_interface_version(u16 *major, u16 *minor)
 {
 	int rc;
 
@@ -237,7 +237,6 @@ int tpm_crb_ffa_get_interface_version(u16 *major, u16 *minor)
 
 	return rc;
 }
-EXPORT_SYMBOL_GPL(tpm_crb_ffa_get_interface_version);
 
 /**
  * tpm_crb_ffa_start() - signals the TPM that a field has changed in the CRB

drivers/char/tpm/tpm_crb_ffa.h

@@ -11,11 +11,9 @@
 
 #if IS_REACHABLE(CONFIG_TCG_ARM_CRB_FFA)
 int tpm_crb_ffa_init(void);
-int tpm_crb_ffa_get_interface_version(u16 *major, u16 *minor);
 int tpm_crb_ffa_start(int request_type, int locality);
 #else
 static inline int tpm_crb_ffa_init(void) { return 0; }
-static inline int tpm_crb_ffa_get_interface_version(u16 *major, u16 *minor) { return 0; }
 static inline int tpm_crb_ffa_start(int request_type, int locality) { return 0; }
 #endif