RDS: cleanup: remove "== NULL"s and "!= NULL"s in ptr comparisons

Favor "if (foo)" style over "if (foo != NULL)".

Signed-off-by: Andy Grover <andy.grover@oracle.com>
diff --git a/net/rds/page.c b/net/rds/page.c
index 595a952..e5b2527 100644
--- a/net/rds/page.c
+++ b/net/rds/page.c
@@ -116,7 +116,7 @@
 	/* jump straight to allocation if we're trying for a huge page */
 	if (bytes >= PAGE_SIZE) {
 		page = alloc_page(gfp);
-		if (page == NULL) {
+		if (!page) {
 			ret = -ENOMEM;
 		} else {
 			sg_set_page(scat, page, PAGE_SIZE, 0);
@@ -162,7 +162,7 @@
 		rem = &per_cpu(rds_page_remainders, get_cpu());
 		local_irq_save(flags);
 
-		if (page == NULL) {
+		if (!page) {
 			ret = -ENOMEM;
 			break;
 		}