[nrf fromtree] boards: nordic: nrf54h20: Increase default MAX_THREAD_BYTES

The mechanism for communication between domains requires
extra threads. So change the default value MAX_THREAD_BYTES
to allow usage of more threads.

Signed-off-by: Georgios Vasilakis <[email protected]>
(cherry picked from commit 8a190e8)

Author: Vge0rge

boards/nordic/nrf54h20dk/Kconfig.defconfig

@@ -6,13 +6,19 @@ if BOARD_NRF54H20DK_NRF54H20_CPUAPP
 config BT_HCI_IPC
 	default y if BT
 
+config MAX_THREAD_BYTES
+	default 3 if USERSPACE
+
 endif # BOARD_NRF54H20DK_NRF54H20_CPUAPP
 
 if BOARD_NRF54H20DK_NRF54H20_CPURAD
 
 config BT_CTLR
 	default y if BT
 
+config MAX_THREAD_BYTES
+	default 3 if USERSPACE
+
 endif # BOARD_NRF54H20DK_NRF54H20_CPURAD
 
 if BOARD_NRF54H20DK_NRF54H20_CPUPPR