hexagon: vdso: Fix build failure

Hexagon images fail to build with the following error.

arch/hexagon/kernel/vdso.c:57:3: error: use of undeclared identifier 'name'
                name = "[vdso]",
                ^

Add the missing '.' to fix the problem.

Fixes: 497258d ("mm: remove legacy install_special_mapping() code")
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Brian Cain <bcain@quicinc.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Author: groeck

arch/hexagon/kernel/vdso.c

@@ -54,7 +54,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 	struct vm_area_struct *vma;
 	struct mm_struct *mm = current->mm;
 	static struct vm_special_mapping vdso_mapping = {
-		name = "[vdso]",
+		.name = "[vdso]",
 	};
 
 	if (mmap_write_lock_killable(mm))