net/sched: rename random32() to prandom_u32()

Use preferable function name which implies using a pseudo-random
number generator.

Signed-off-by: Akinobu Mita <[e-mail]>
Cc: Stephen Hemminger <[e-mail]>
Cc: Jamal Hadi Salim <[e-mail]>
Cc: "David S. Miller" <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

net/sched/sch_choke.c

···
 /* deliver a random number between 0 and N - 1 */
 static u32 random_N(unsigned int N)
 {
-	return reciprocal_divide(random32(), N);
+	return reciprocal_divide(prandom_u32(), N);
 }
 
 /* number of elements in queue including holes */