arch_topology: Get rid of cap_parsing_done

There is no need to check for cap_parsing_done flag anymore as
!raw_capacity flag alone is enough for us. Remove the (now) useless flag
cap_parsing_done.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Juri Lelli <juri.lelli@arm.com>
Tested-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>