cpufreq: powernv-cpufreq: Fix a bunch of kerneldoc related issues

Repair problems with formatting and missing attributes/parameters, and
demote header comments which do not meet the required standards
applicable to kerneldoc.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/powernv-cpufreq.c:84: warning: Function parameter or member 'last_lpstate_idx' not described in 'global_pstate_info'
 drivers/cpufreq/powernv-cpufreq.c:84: warning: Function parameter or member 'last_gpstate_idx' not described in 'global_pstate_info'
 drivers/cpufreq/powernv-cpufreq.c:84: warning: Function parameter or member 'policy' not described in 'global_pstate_info'
 drivers/cpufreq/powernv-cpufreq.c:182: warning: Function parameter or member 'i' not described in 'idx_to_pstate'
 drivers/cpufreq/powernv-cpufreq.c:201: warning: Function parameter or member 'pstate' not described in 'pstate_to_idx'
 drivers/cpufreq/powernv-cpufreq.c:670: warning: Function parameter or member 't' not described in 'gpstate_timer_handler'
 drivers/cpufreq/powernv-cpufreq.c:670: warning: Excess function parameter 'data' description in 'gpstate_timer_handler'
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/powernv-cpufreq.c

@@ -64,13 +64,14 @@
  *				highest_lpstate_idx
  * @last_sampled_time:		Time from boot in ms when global pstates were
  *				last set
- * @last_lpstate_idx,		Last set value of local pstate and global
- * last_gpstate_idx		pstate in terms of cpufreq table index
+ * @last_lpstate_idx:		Last set value of local pstate and global
+ * @last_gpstate_idx:		pstate in terms of cpufreq table index
  * @timer:			Is used for ramping down if cpu goes idle for
  *				a long time with global pstate held high
  * @gpstate_lock:		A spinlock to maintain synchronization between
  *				routines called by the timer handler and
  *				governer's target_index calls
+ * @policy:			Associated CPUFreq policy
  */
 struct global_pstate_info {
 	int highest_lpstate_idx;
@@ -170,7 +171,7 @@ static inline u8 extract_pstate(u64 pmsr_val, unsigned int shift)
 
 /* Use following functions for conversions between pstate_id and index */
 
-/**
+/*
  * idx_to_pstate : Returns the pstate id corresponding to the
  *		   frequency in the cpufreq frequency table
  *		   powernv_freqs indexed by @i.
@@ -188,7 +189,7 @@ static inline u8 idx_to_pstate(unsigned int i)
 	return powernv_freqs[i].driver_data;
 }
 
-/**
+/*
  * pstate_to_idx : Returns the index in the cpufreq frequencytable
  *		   powernv_freqs for the frequency whose corresponding
  *		   pstate id is @pstate.
@@ -660,7 +661,7 @@ static inline void  queue_gpstate_timer(struct global_pstate_info *gpstates)
 /**
  * gpstate_timer_handler
  *
- * @data: pointer to cpufreq_policy on which timer was queued
+ * @t: Timer context used to fetch global pstate info struct
  *
  * This handler brings down the global pstate closer to the local pstate
  * according quadratic equation. Queues a new timer if it is still not equal