staging: comedi: addi_eeprom: cleanup i_EepromReadTimerHeader()

Use this function to set the private data instead of doing it in the
i_EepromReadMainHeader() function. Keep the eeprom read code #if 0'ed
out for now.

Add namespace by renaming this CamelCase function to
addi_eeprom_read_timer_info().

Remove the unused str_TimerMainHeader and str_TimerDetails structs.

The return value is always 0 and it's never checked. Change it to void.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>