samples: userspace: cortex_r8_virtual: Set CONFIG_DYNAMIC_OBJECTS=y

Enable kernel dynamic object allocation.
Otherwise the following error is printed:

    E: 0xa138 is not a valid sample driver
    E: address is not a known kernel object
    E: syscall z_vrfy_sample_driver_state_set failed check: access denied
    E: couldn't start driver interrupts

Signed-off-by: Marek Slowinski <[email protected]>
Signed-off-by: Mateusz Hołenko <[email protected]>

Author: mars-low

samples/userspace/prod_consumer/boards/cortex_r8_virtual.conf

@@ -0,0 +1 @@
+CONFIG_DYNAMIC_OBJECTS=y