tests: subsys: settings: fcb: Fix failure on nrf52_pca10040
tests: subsys: settings: fcb: Fix failure on nrf52_pca10040

Tests failed on the target because flash area reserved
for fcb data storage was to small.
This path add dts overlay file for nrf52_pac10040 board which
increases this flash area to proper size.

Fixes #8038

Signed-off-by: Andrzej Puzdrowski <0222c24e1773dd88269ed0e559909ec9bea3604a@nordicsemi.no>

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