cpufreq: rename index as driver_data in cpufreq_frequency_table

The "index" field of struct cpufreq_frequency_table was never an
index and isn't used at all by the cpufreq core.  It only is useful
for cpufreq drivers for their internal purposes.

Many people nowadays blindly set it in ascending order with the
assumption that the core will use it, which is a mistake.

Rename it to "driver_data" as that's what its purpose is. All of its
users are updated accordingly.

[rjw: Changelog]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/longhaul.c b/drivers/cpufreq/longhaul.c
index b448638..b6a0a7a 100644
--- a/drivers/cpufreq/longhaul.c
+++ b/drivers/cpufreq/longhaul.c
@@ -254,7 +254,7 @@
 	u32 bm_timeout = 1000;
 	unsigned int dir = 0;
 
-	mults_index = longhaul_table[table_index].index;
+	mults_index = longhaul_table[table_index].driver_data;
 	/* Safety precautions */
 	mult = mults[mults_index & 0x1f];
 	if (mult == -1)
@@ -487,7 +487,7 @@
 		if (ratio > maxmult || ratio < minmult)
 			continue;
 		longhaul_table[k].frequency = calc_speed(ratio);
-		longhaul_table[k].index	= j;
+		longhaul_table[k].driver_data	= j;
 		k++;
 	}
 	if (k <= 1) {
@@ -508,8 +508,8 @@
 		if (min_i != j) {
 			swap(longhaul_table[j].frequency,
 			     longhaul_table[min_i].frequency);
-			swap(longhaul_table[j].index,
-			     longhaul_table[min_i].index);
+			swap(longhaul_table[j].driver_data,
+			     longhaul_table[min_i].driver_data);
 		}
 	}
 
@@ -517,7 +517,7 @@
 
 	/* Find index we are running on */
 	for (j = 0; j < k; j++) {
-		if (mults[longhaul_table[j].index & 0x1f] == mult) {
+		if (mults[longhaul_table[j].driver_data & 0x1f] == mult) {
 			longhaul_index = j;
 			break;
 		}
@@ -613,7 +613,7 @@
 			pos = (speed - min_vid_speed) / kHz_step + minvid.pos;
 		else
 			pos = minvid.pos;
-		longhaul_table[j].index |= mV_vrm_table[pos] << 8;
+		longhaul_table[j].driver_data |= mV_vrm_table[pos] << 8;
 		vid = vrm_mV_table[mV_vrm_table[pos]];
 		printk(KERN_INFO PFX "f: %d kHz, index: %d, vid: %d mV\n",
 				speed, j, vid.mV);
@@ -656,12 +656,12 @@
 		 * this in hardware, C3 is old and we need to do this
 		 * in software. */
 		i = longhaul_index;
-		current_vid = (longhaul_table[longhaul_index].index >> 8);
+		current_vid = (longhaul_table[longhaul_index].driver_data >> 8);
 		current_vid &= 0x1f;
 		if (table_index > longhaul_index)
 			dir = 1;
 		while (i != table_index) {
-			vid = (longhaul_table[i].index >> 8) & 0x1f;
+			vid = (longhaul_table[i].driver_data >> 8) & 0x1f;
 			if (vid != current_vid) {
 				longhaul_setstate(policy, i);
 				current_vid = vid;