omap3: cm-t35: remove enable_gpmc_cs_config()

The gpmc_init() function already calls enable_gpmc_cs_config() for chip
select 0. Although the bus width is configured for 16 bit, it gets
reconfigured correctly in the omap_gpmc driver later.

Remove the enable_gpmc_cs_config() function call and the associated
gpmc_nand_config[] array.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>