Convert malloc() uses to xmalloc().

Signed-off-by: Scott Wood <scottwood@freescale.com>

dtc-lexer.l

@@ -273,11 +273,7 @@ int push_input_file(const char *filename)
 		exit(1);
 	}
 
-	incl_file = malloc(sizeof(struct incl_file));
-	if (!incl_file) {
-		yyerror("Can not allocate include file space.");
-		return 0;
-	}
+	incl_file = xmalloc(sizeof(struct incl_file));
 
 	/*
 	 * Save current context.

srcpos.c

@@ -33,9 +33,7 @@ static int dtc_open_one(struct dtc_file *file,
 	char *fullname;
 
 	if (search) {
-		fullname = malloc(strlen(search) + strlen(fname) + 2);
-		if (!fullname)
-			die("Out of memory\n");
+		fullname = xmalloc(strlen(search) + strlen(fname) + 2);
 
 		strcpy(fullname, search);
 		strcat(fullname, "/");
@@ -63,15 +61,11 @@ struct dtc_file *dtc_open_file(const char *fname,
 	struct dtc_file *file;
 	const char *slash;
 
-	file = malloc(sizeof(struct dtc_file));
-	if (!file)
-		die("Out of memory\n");
+	file = xmalloc(sizeof(struct dtc_file));
 
 	slash = strrchr(fname, '/');
 	if (slash) {
-		char *dir = malloc(slash - fname + 1);
-		if (!dir)
-			die("Out of memory\n");
+		char *dir = xmalloc(slash - fname + 1);
 
 		memcpy(dir, fname, slash - fname);
 		dir[slash - fname] = 0;