ARM: OMAP2+: Use kcalloc() in sr_set_nvalues()

* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "kcalloc".

  This issue was detected by using the Coccinelle software.

* Replace the specification of a data structure by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/sr_device.c

@@ -44,9 +44,7 @@ static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
 	while (volt_data[count].volt_nominal)
 		count++;
 
-	nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count,
-			GFP_KERNEL);
-
+	nvalue_table = kcalloc(count, sizeof(*nvalue_table), GFP_KERNEL);
 	if (!nvalue_table) {
 		pr_err("OMAP: SmartReflex: cannot allocate memory for n-value table\n");
 		return;