boards: nrf54l15bsim: Mention CLOCK

As now we have a sufficient model of the CLOCK peripheral,
let's mention it in the docs, and correct the warning
about not supporting the BLE stack.

Signed-off-by: Alberto Escolar Piedras <[email protected]>

Author: aescolar

boards/native/nrf_bsim/doc/nrf54l15bsim.rst

@@ -32,11 +32,12 @@ on the simulated nRF54L15 SOC.
 .. warning::
 
    This target is experimental, and even though it includes models of the RADIO, it does not yet
-   include models of the AAR, CCM, ECB or CLOCK peripherals, so the BLE and 802.15.4 stacks cannot
-   be run on it yet.
+   include models of the AAR, CCM or ECB peripherals, so the BLE and 802.15.4 stacks can only be
+   run without encryption or privacy features so far.
 
 This boards include models of some of the nRF54L15 SOC peripherals:
 
+* CLOCK (Clock control)
 * DPPI (Distributed Programmable Peripheral Interconnect)
 * EGU (Event Generator Unit)
 * FICR (Factory Information Configuration Registers)