hw/fake-nvram: Remove init of static variable to null

Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

hw/fake-nvram.c

@@ -19,7 +19,7 @@
 #include <mem_region.h>
 #include <lock.h>
 
-static struct mem_region *nvram_region = NULL;
+static struct mem_region *nvram_region;
 static struct lock fake_nvram_lock = LOCK_UNLOCKED;
 
 int fake_nvram_info(uint32_t *total_size)