cpufreq: Use sizeof(*ptr) convetion for computing sizes

Chapter 14 of Documentation/CodingStyle says:

The preferred form for passing a size of a struct is the following:

	p = kmalloc(sizeof(*p), ...);

The alternative form where struct name is spelled out hurts
readability and introduces an opportunity for a bug when the pointer
variable type is changed but the corresponding sizeof that is passed
to a memory allocator is not.

This wasn't followed consistently in drivers/cpufreq, let's make it
more consistent by always following this rule.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c
index 7ba4234..4d7799b 100644
--- a/drivers/cpufreq/pmac64-cpufreq.c
+++ b/drivers/cpufreq/pmac64-cpufreq.c
@@ -447,9 +447,8 @@
 		if (!shdr)
 			goto bail_noprops;
 		g5_fvt_table = (struct smu_sdbp_fvt *)&shdr[1];
-		ssize = (shdr->len * sizeof(u32)) -
-			sizeof(struct smu_sdbp_header);
-		g5_fvt_count = ssize / sizeof(struct smu_sdbp_fvt);
+		ssize = (shdr->len * sizeof(u32)) - sizeof(*shdr);
+		g5_fvt_count = ssize / sizeof(*g5_fvt_table);
 		g5_fvt_cur = 0;
 
 		/* Sanity checking */