random: Do not include <linux/prandom.h> in <linux/random.h>

Files that use prandom infrastructure are now converted to
use <linux/prandom.h> header instead of <linux/random.h>.
Remove the legacy inclusion of <linux/prandom.h> from
<linux/random.h>.

This is the "nice cleanup" part, wished in c0842fb.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Fixes: c0842fb ("random32: move the pseudo-random 32-bit definitions to prandom.h")
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Author: ubizjak

include/linux/random.h

@@ -145,13 +145,6 @@ declare_get_random_var_wait(u64, u32)
 declare_get_random_var_wait(long, unsigned long)
 #undef declare_get_random_var
 
-/*
- * This is designed to be standalone for just prandom
- * users, but for now we include it from <linux/random.h>
- * for legacy reasons.
- */
-#include <linux/prandom.h>
-
 #ifdef CONFIG_SMP
 int random_prepare_cpu(unsigned int cpu);
 int random_online_cpu(unsigned int cpu);