net: replace macros net_random and net_srandom with direct calls to prandom

This patch removes the net_random and net_srandom macros and replaces
them with direct calls to the prandom ones. As new commits only seem to
use prandom_u32 there is no use to keep them around.
This change makes it easier to grep for users of prandom_u32.

Signed-off-by: Aruna-Hewapathirane <aruna.hewapathirane@gmail.com>
Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 9809f7b..646023b 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -464,7 +464,7 @@
 	}
 
 	if (!(ifa->ifa_flags & IFA_F_SECONDARY)) {
-		net_srandom(ifa->ifa_local);
+		prandom_seed((__force u32) ifa->ifa_local);
 		ifap = last_primary;
 	}