[nrf fromtree] scripts: runners: nrf: Fix flashing of FLPR/PPR on nRF54H20

After commit aaefaad, flashing of the FLPR and PPR cores in the nRF54H20
was broken due to those cores missing from the _get_core() function that
retrieves the core to program, triggering an exception. Fix it by
referencing those cores and mapping them to the application core.

Signed-off-by: Carles Cufi <[email protected]>
(cherry picked from commit 7254a61)

Author: carlescufi

scripts/west_commands/runners/nrf_common.py

@@ -307,6 +307,8 @@ def recover_target(self):
     def _get_core(self):
         if self.family in ('nrf54h', 'nrf92'):
             if (self.build_conf.getboolean('CONFIG_SOC_NRF54H20_CPUAPP') or
+                self.build_conf.getboolean('CONFIG_SOC_NRF54H20_CPUFLPR') or
+                self.build_conf.getboolean('CONFIG_SOC_NRF54H20_CPUPPR') or
                 self.build_conf.getboolean('CONFIG_SOC_NRF9280_CPUAPP')):
                 return 'Application'
             if (self.build_conf.getboolean('CONFIG_SOC_NRF54H20_CPURAD') or