board: em_starterkit doesn't have FLASH_SCRIPT yet
board: em_starterkit doesn't have FLASH_SCRIPT yet

I see in the TOP makefile that if FLASH_SCRIPT is undefined,
it outputs the message "Flashing not supported with this board".
This behavior is wanted currently as this board does not
have a memory mapped FLASH device. It has a SPI-FLASH and
there are different instructions for putting an image on to the board.

Change-Id: I07dcdd9a7fd8346b846ee0fe1312d22f9ffaa13e
Signed-off-by: Chuck Jordan <c464ed312fa6f818297227c7e5018fc9f4bd95ad@synopsys.com>

fractalclone/zephyr-riscv,bboozzoo/zephyr,nashif/zephyr,finikorg/zephyr,bboozzoo/zephyr,kraj/zephyr,pklazy/zephyr,kraj/zephyr,holtmann/zephyr,zephyriot/zephyr,runchip/zephyr-cc3200,holtmann/zephyr,pklazy/zephyr,sharronliu/zephyr,runchip/zephyr-cc3220,tidyjiang8/zephyr-doc,holtmann/zephyr,erwango/zephyr,bigdinotech/zephyr,explora26/zephyr,fbsder/zephyr,tidyjiang8/zephyr-doc,runchip/zephyr-cc3200,fractalclone/zephyr-riscv,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr,Vudentz/zephyr,bboozzoo/zephyr,zephyriot/zephyr,aceofall/zephyr-iotos,punitvara/zephyr,punitvara/zephyr,runchip/zephyr-cc3220,explora26/zephyr,sharronliu/zephyr,nashif/zephyr,ldts/zephyr,sharronliu/zephyr,bigdinotech/zephyr,erwango/zephyr,bboozzoo/zephyr,zephyriot/zephyr,tidyjiang8/zephyr-doc,zephyrproject-rtos/zephyr,mbolivar/zephyr,rsalveti/zephyr,bigdinotech/zephyr,rsalveti/zephyr,kraj/zephyr,GiulianoFranchetto/zephyr,rsalveti/zephyr,sharronliu/zephyr,GiulianoFranchetto/zephyr,holtmann/zephyr,mirzak/zephyr-os,Vudentz/zephyr,galak/zephyr,mirzak/zephyr-os,mbolivar/zephyr,runchip/zephyr-cc3220,GiulianoFranchetto/zephyr,galak/zephyr,fractalclone/zephyr-riscv,tidyjiang8/zephyr-doc,pklazy/zephyr,nashif/zephyr,pklazy/zephyr,fbsder/zephyr,rsalveti/zephyr,explora26/zephyr,galak/zephyr,nashif/zephyr,sharronliu/zephyr,bigdinotech/zephyr,punitvara/zephyr,runchip/zephyr-cc3200,nashif/zephyr,fractalclone/zephyr-riscv,galak/zephyr,rsalveti/zephyr,runchip/zephyr-cc3220,aceofall/zephyr-iotos,mbolivar/zephyr,explora26/zephyr,Vudentz/zephyr,galak/zephyr,punitvara/zephyr,erwango/zephyr,runchip/zephyr-cc3200,zephyriot/zephyr,bboozzoo/zephyr,fbsder/zephyr,finikorg/zephyr,ldts/zephyr,mbolivar/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,fbsder/zephyr,tidyjiang8/zephyr-doc,runchip/zephyr-cc3200,holtmann/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,fractalclone/zephyr-riscv,zephyriot/zephyr,fbsder/zephyr,ldts/zephyr,bigdinotech/zephyr,erwango/zephyr,GiulianoFranchetto/zephyr,kraj/zephyr,aceofall/zephyr-iotos,erwango/zephyr,mirzak/zephyr-os,aceofall/zephyr-iotos,ldts/zephyr,finikorg/zephyr,runchip/zephyr-cc3220,aceofall/zephyr-iotos,pklazy/zephyr,mirzak/zephyr-os,kraj/zephyr,Vudentz/zephyr,ldts/zephyr,mirzak/zephyr-os,mbolivar/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr