include/linux/mm.h: simplify flag check

Flip the flag test so that it is the simplest. No functional change, just
a small readability improvement:

No code changed:

# arch/x86/kernel/sys_x86_64.o:

text data bss dec hex filename
1551 24 0 1575 627 sys_x86_64.o.before
1551 24 0 1575 627 sys_x86_64.o.after

md5:
70708d1b1ad35cc891118a69dc1a63f9 sys_x86_64.o.before.asm
70708d1b1ad35cc891118a69dc1a63f9 sys_x86_64.o.after.asm

Signed-off-by: Borislav Petkov <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/linux/mm.h

···
 static inline unsigned long
 vm_unmapped_area(struct vm_unmapped_area_info *info)
 {
-	if (!(info->flags & VM_UNMAPPED_AREA_TOPDOWN))
-		return unmapped_area(info);
-	else
+	if (info->flags & VM_UNMAPPED_AREA_TOPDOWN)
 		return unmapped_area_topdown(info);
+	else
+		return unmapped_area(info);
 }
 
 /* truncate.c */