wdt_qmsi: Implement suspend and resume functions
wdt_qmsi: Implement suspend and resume functions

In order to restore watchdog context after entering
SYS_PM_DEEP_SLEEP, suspend and resume functions
are called.

The following parameters are restored:
 - All registers for the WDT device.
 - Watchdog interrupt mask.

The suspend/resume functionality is implemented in
the QMSI shim layer as a fast and temporary solution,
it will be removed and migrated to QMSI later.

Change-Id: I6e4e30a797b0ca38ce727d50fa51d1b2f8330405
Signed-off-by: Julien Delayen <9aa90e4699c54ee9c0d95f6d19509b120c7bfa6f@intel.com>

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