Mistook "access" for "usage". Fixed.

Change-Id: I8c61aa9dbc0ebd2a68f4363a1d59f9aae7dbc056
Reviewed-on: https://swiftshader-review.googlesource.com/14129Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>