of: reserved-memory: remove duplicated call to of_get_flat_dt_prop() for no-map node

Just use nomap instead of the second call to of_get_flat_dt_prop(). And
change nomap as a bool type due to != NULL operator. Also, correct comment
about node of 'align' -> 'alignment'.

Signed-off-by: Yue Hu <huyue2@yulong.com>
Link: https://lore.kernel.org/r/20200730092353.15644-1-zbestahu@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>

drivers/of/of_reserved_mem.c

@@ -69,7 +69,7 @@ void __init fdt_reserved_mem_save_node(unsigned long node, const char *uname,
 
 /**
  * __reserved_mem_alloc_size() - allocate reserved memory described by
- *	'size', 'align'  and 'alloc-ranges' properties.
+ *	'size', 'alignment'  and 'alloc-ranges' properties.
  */
 static int __init __reserved_mem_alloc_size(unsigned long node,
 	const char *uname, phys_addr_t *res_base, phys_addr_t *res_size)
@@ -79,7 +79,7 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 	phys_addr_t base = 0, align = 0, size;
 	int len;
 	const __be32 *prop;
-	int nomap;
+	bool nomap;
 	int ret;
 
 	prop = of_get_flat_dt_prop(node, "size", &len);
@@ -92,8 +92,6 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 	}
 	size = dt_mem_next_cell(dt_root_size_cells, &prop);
 
-	nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;
-
 	prop = of_get_flat_dt_prop(node, "alignment", &len);
 	if (prop) {
 		if (len != dt_root_addr_cells * sizeof(__be32)) {
@@ -104,11 +102,13 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 		align = dt_mem_next_cell(dt_root_addr_cells, &prop);
 	}
 
+	nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;
+
 	/* Need adjust the alignment to satisfy the CMA requirement */
 	if (IS_ENABLED(CONFIG_CMA)
 	    && of_flat_dt_is_compatible(node, "shared-dma-pool")
 	    && of_get_flat_dt_prop(node, "reusable", NULL)
-	    && !of_get_flat_dt_prop(node, "no-map", NULL)) {
+	    && !nomap) {
 		unsigned long order =
 			max_t(unsigned long, MAX_ORDER - 1, pageblock_order);
 
@@ -247,7 +247,7 @@ void __init fdt_init_reserved_mem(void)
 		int len;
 		const __be32 *prop;
 		int err = 0;
-		int nomap;
+		bool nomap;
 
 		nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;
 		prop = of_get_flat_dt_prop(node, "phandle", &len);