add support for parsing caption service descriptor 0x86

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
backport function 'dvbpsi_get_bits' for the dr_a1 code
add support for parsing service location descriptor 0xA1
dr_86: rename dvbpsi_caption_service_s::i_ISO_639_language_code to i_iso_639_code

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
dr_a1: rename dvbpsi_service_location_element_s::i_ISO_639_language_code to i_iso_639_code

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
dr_a1: fix capitalization

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
dr_a1: fix description of i_pcr_pid

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>