api/spi: Removing eeprom mode in configuration
api/spi: Removing eeprom mode in configuration

EEPROM mode can be, in fact, asserted from tx_bufs/rx_bufs thus removing
it.

Fixes #5839

Signed-off-by: Tomasz Bursztyka <ba81a3a719836727e6857ae83462b9f52ec41006@linux.intel.com>

punitvara/zephyr,explora26/zephyr,mbolivar/zephyr,kraj/zephyr,ldts/zephyr,galak/zephyr,kraj/zephyr,explora26/zephyr,mbolivar/zephyr,nashif/zephyr,nashif/zephyr,punitvara/zephyr,punitvara/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,nashif/zephyr,zephyriot/zephyr,kraj/zephyr,galak/zephyr,zephyriot/zephyr,galak/zephyr,Vudentz/zephyr,ldts/zephyr,mbolivar/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,kraj/zephyr,Vudentz/zephyr,ldts/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,mbolivar/zephyr,zephyriot/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,mbolivar/zephyr,galak/zephyr,nashif/zephyr,zephyriot/zephyr,finikorg/zephyr,punitvara/zephyr,Vudentz/zephyr,ldts/zephyr,explora26/zephyr,zephyriot/zephyr,Vudentz/zephyr,punitvara/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr