Kernel+Userland: Make some of the POSIX types larger

Expand the following types from 32-bit to 64-bit:
- blkcnt_t
- blksize_t
- dev_t
- nlink_t
- suseconds_t
- clock_t

This matches their size on other 64-bit systems.

Userland/Utilities/ls.cpp

@@ -337,7 +337,7 @@ static bool print_filesystem_object(DeprecatedString const& path, DeprecatedStri
     else
         printf("%c", st.st_mode & S_IXOTH ? 'x' : '-');
 
-    printf(" %3u", st.st_nlink);
+    printf(" %3lu", st.st_nlink);
 
     auto username = users.get(st.st_uid);
     if (!flag_print_numeric && username.has_value()) {