acpi_parse_entries passes the table end pointer to the sub-table entry
handler. acpi_parse_entries itself could validate the end of an entry
against the table end using the length in the sub-table entry.
This patch adds the validation of the sub-table entry end using the
length field.This will help to eliminate the need to pass the table end
to the handlers.
It also moves the check for zero length entry early so that execution of
the handler can be avoided.
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>