random32: Include <linux/prandom.h> instead of <linux/random.h>

Substitute the inclusion of <linux/random.h> header with
<linux/prandom.h> to allow the removal of legacy inclusion
of <linux/prandom.h> from <linux/random.h>.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Author: ubizjak

lib/random32.c

@@ -36,7 +36,7 @@
 #include <linux/percpu.h>
 #include <linux/export.h>
 #include <linux/jiffies.h>
-#include <linux/random.h>
+#include <linux/prandom.h>
 #include <linux/sched.h>
 #include <linux/bitops.h>
 #include <linux/slab.h>