firmware: qcom: scm: Fix some kernel-doc comments

Fix qcom_scm_call(), qcom_scm_call_atomic,
and qcom_scm_cpu_power_down() kernel-doc comment to remove
remove warnings found by running scripts/kernel-doc, which
is caused by using 'make W=1'.
drivers/firmware/qcom_scm.c:191: warning: Function parameter or member
'res' not described in 'qcom_scm_call'
drivers/firmware/qcom_scm.c:191: warning: Excess function parameter
'svc_id' description in 'qcom_scm_call'
drivers/firmware/qcom_scm.c:191: warning: Excess function parameter
'cmd_id' description in 'qcom_scm_call'
drivers/firmware/qcom_scm.c:219: warning: Excess function parameter
'svc_id' description in 'qcom_scm_call_atomic'
drivers/firmware/qcom_scm.c:219: warning: Excess function parameter
'cmd_id' description in 'qcom_scm_call_atomic'
drivers/firmware/qcom_scm.c:360: warning: Function parameter or member
'flags' not described in 'qcom_scm_cpu_power_down'
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211230141245.29444-1-yang.lee@linux.alibaba.com

drivers/firmware/qcom_scm.c

@@ -179,9 +179,8 @@ static enum qcom_scm_convention __get_convention(void)
 /**
  * qcom_scm_call() - Invoke a syscall in the secure world
  * @dev:	device
- * @svc_id:	service identifier
- * @cmd_id:	command identifier
  * @desc:	Descriptor structure containing arguments and return values
+ * @res:        Structure containing results from SMC/HVC call
  *
  * Sends a command to the SCM and waits for the command to finish processing.
  * This should *only* be called in pre-emptible context.
@@ -205,8 +204,6 @@ static int qcom_scm_call(struct device *dev, const struct qcom_scm_desc *desc,
 /**
  * qcom_scm_call_atomic() - atomic variation of qcom_scm_call()
  * @dev:	device
- * @svc_id:	service identifier
- * @cmd_id:	command identifier
  * @desc:	Descriptor structure containing arguments and return values
  * @res:	Structure containing results from SMC/HVC call
  *
@@ -350,7 +347,7 @@ EXPORT_SYMBOL(qcom_scm_set_cold_boot_addr);
 
 /**
  * qcom_scm_cpu_power_down() - Power down the cpu
- * @flags - Flags to flush cache
+ * @flags:	Flags to flush cache
  *
  * This is an end point to power down cpu. If there was a pending interrupt,
  * the control would return from this function, otherwise, the cpu jumps to the