updated zc706 hdmi pin constraints. zc706 has 24-bit hdmi

Change-Id: I158d4c25ef806ef590cd6494338f60922b0dc648
support for 16bit or 24bit HDMI

Change-Id: Ic02bf2499225d5a0da95aa1185140226036685c1
added i2c_read_reg

Change-Id: I2230bd55cac5a182a030783023a89ede5851dea1
remove debug printf

Change-Id: I9616e729e5436aaa2652053d439a114ffa015089
EDID parser

Change-Id: Idbb019c494b896e808f2d6688c35d9daf2ffbd2f
updated testhdmidisplay.cpp to use parameters from monitor EDID

Change-Id: Ie46bd2c92d0043f58fec7f77641e5c9af2629f82