sidk_s5jt200: add to support on-board eeprom

sidk_s5jt200: add to support on-board eeprom

On SIDK board there is a MicroWire EEPROM.

In order to use it driver is implemented. Driver is based on bitbang SPI
emulation, since T200 SPI does not support non 8 bit aligned transfers,
used by EEPROM.

To enable driver, in make menuconfig enable next options:

Device Drivers  --->
	[*] SPI Driver Support  --->
		[*]   SPI bit-bang device
		[*]     SPI bit-bang variable width transfers

Board Selection  --->
	[*] Support M93C66WMN6T EEPROM

Change-Id: Ia3ecf868f207866b6f19590a0e9a2900d18c1340
Signed-off-by: Ivan <ivan.galkin@samsung.com>