fixed streamguard CA card descrambler .

streamguard CA cardid 0x4ad2.
add dvb_support  gb2312 and ucs2.
add missing  ac3 audio track.

0x06 is Chinese Cable TV ac3 audio track.
Update dvb_psi.c
Update dvb_psi.c
change the streamguard cwc_emm function.
fixed some errors.
changed this files to not executable attribute.
deleted the unnecessary blank space.
add gb2312 ucs2 dvb-charset
fixed some ugly code's formats.Thanks @perexg help!
Add missing space after '='.
Remove the blank line.
Add a deleted blank line.
fixed stream guard card data length.
reverted  the files" descrambler.h cwc.c descrambler.c" executable attribute.