Since the baseboard is made for multiple SOM modules, the baseboard numbering of GPIO signals is different from that of the i.MX27. The i.MX27 signal "OE_ACD" goes from pad D3 to pin J1:38 on the SOM where it is called LCD_OE_ACD. The corresponding port pin on the '27 is PA31. You configure it as an output enable signal by clearing bit 31 in both the GIUS_A and GPR_A registers. If you are basing your port on the MX27ADS code then this is already being done for you in the "gpio_lcdc_active" function:
gpio_request_mux(MX27_PIN_OE_ACD, GPIO_MUX_PRIMARY);
You'll notice that the LCD output enable signal on the ZoomLite baseboard is not present on the connector to the LCD because the SHARP panels can operate without the OE signal. On the SHARP VGA panel the OE signal is called ENAB and can optionally be tied low. It might worth checking whether it is optional on the Samsung panel as well.
Good luck.
-john