um: net: Eliminate NULL test after alloc_bootmem

alloc_bootmem and related functions never return NULL. Thus a NULL
test or memset after calls to these functions is unnecessary.

The following Coccinelle semantic patch was used for making the change:

@@
expression E;
statement S;
@@

E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...)
... when != E
- if (E == NULL) S
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/drivers/net_kern.c

@@ -659,10 +659,6 @@ static int __init eth_setup(char *str)
 	}
 
 	new = alloc_bootmem(sizeof(*new));
-	if (new == NULL) {
-		printk(KERN_ERR "eth_init : alloc_bootmem failed\n");
-		return 1;
-	}
 
 	INIT_LIST_HEAD(&new->list);
 	new->index = n;