dma: Add possibility for up to 3 DMA Controllers
dma: Add possibility for up to 3 DMA Controllers

Currently only 1 is allowed.  While we're at it, let's generify the
existing entries, since they could be used by all controllers, not
just QMSI.

Change-Id: Iec5d195fff239931b21a7584eb4b642b40f95be5
Signed-off-by: Lee Jones <630e34333487a351a857f6b705e04d30b37c1629@linaro.org>

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