MIPS: Remove useless zero initializations.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 2950b97..2b290d7 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -441,7 +441,7 @@
  * initialization hook for anything else was introduced.
  */
 
-static int usermem __initdata = 0;
+static int usermem __initdata;
 
 static int __init early_parse_mem(char *p)
 {