tpm: fix kdoc for tpm2_flush_context_cmd()

kdoc for tpm2_flush_context_cmd() was off.

Fixes: 9aa36b39 ("tpm: export tpm2_flush_context_cmd")'
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

drivers/char/tpm/tpm2-cmd.c

@@ -343,10 +343,9 @@ int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max)
 /**
  * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command
  * @chip:	TPM chip to use
- * @payload: the key data in clear and encrypted form
- * @options: authentication values and other options
+ * @handle:	context handle
+ * @flags:	tpm transmit flags - bitmap
  *
- * Return: same as with tpm_transmit_cmd
  */
 void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
 			    unsigned int flags)