update ps4eye_reg.h with info about how things are done

I am working on osx driver right now, base for control transfer is done, i have some other changes to commit but i need to test them before.

i have ready functions to read and write registers in single mode and multi mode
/*
 * Read a register from one of the chips managed by ov580
 * It is read in 2 phases, first we send reg to read and subaddr with brequest 0xa5
 * then in second phase with brequest 0xa6 we received value from register
 * reg 16 bit register to read
 * subaddr 8 bit subaddress chip select
 * usb control transfer user data format 64 bytes
 * OUT format
 * byte 0 it seem to depend to subbaddr value
 * byte 1-7 00
 * byte 8 reg low  byte
 * byte 9 reg high byte
 * byte 10 00 (here we received the value in second phase read
 * byte 11 subaddr
 * IN format like OUT format but include: 
 * byte 10  value readed from reg
 */

uint8_t PS4EYECam::register_read(uint16_t reg,uint8_t subaddr)

/*
 * Write a register from one of the chips managed by ov580
 * We send reg to write, value and subaddr with brequest 0xa4
 * then in second phase with brequest 0xa6 we received value from register
 * reg 16 bit register to write
 * val 8 bit value to write
 * subaddr 8 bit subaddress chip select
 * usb control transfer user data format 64 bytes
 * OUT format
 * byte 0 it seem to depend to subbaddr value
 * byte 1-7 00
 * byte 8 reg low  byte
 * byte 9 reg high byte
 * byte 10 val
 * byte 11 subaddr
 */

void PS4EYECam::register_write(uint16_t reg, uint8_t val,uint8_t subaddr)

void PS4EYECam::multi_register_read(const uint16_t (*data), uint8_t subaddr)

Sample code reading in single/multi mode:
sensor_id_h=register_read(OV9713_CHIP_ID_HI, 0x1);
sensor_id_l=register_read(OV9713_CHIP_ID_LO, 0x1);
sensor_id=sensor_id_h<<8|sensor_id_l;
debug("sensor id 0x%04x \n",sensor_id);
multi_register_read(sensor1_reg_read,0x01);

Output from osx console:
Found idvendor: 0x05a9 idproduct 0x058a 
PS4EYECam created
read sensor_id from sensor1
read  register 0x300a  value 0x97 
read  register 0x300b  value 0x13 
sensor id 0x9713 
size data 2
read  register 0x300a  value 0x97 
register 0x300a: 0x97
read  register 0x300b  value 0x13 
register 0x300b: 0x13

Check the format included in .h(follow usb capture  after upload firmware) to see how set/get is done 

I will open a folder osx/src to add my stuff on it to make easy to merge with you.

firmware will be more difficult to reverse, it has code for embed microcontroller i see also register set list part inside.

more to come :P