[nrf fromtree] doc boards nrfbsim: Update list of supported HW

The models include enough of the CRACEN to run the same
nrfx drivers as in Zephyr. So let's add it to the list.

Also let's remove the RTC from the list as the hal does not
expose it anymore for this platform as the GRTC is to be used
instead.

Signed-off-by: Alberto Escolar Piedras <[email protected]>
(cherry picked from commit a211999)

Author: aescolar

boards/native/nrf_bsim/doc/nrf54l15bsim.rst

@@ -40,6 +40,7 @@ This boards include models of some of the nRF54L15 SOC peripherals:
 * AAR (Accelerated Address Resolver)
 * CCM (AES CCM mode encryption)
 * CLOCK (Clock control)
+* CRACEN (Crypto Accelerator Engine)
 * DPPI (Distributed Programmable Peripheral Interconnect)
 * ECB (AES electronic codebook mode encryption)
 * EGU (Event Generator Unit)
@@ -49,7 +50,6 @@ This boards include models of some of the nRF54L15 SOC peripherals:
 * PPIB (PPI Bridge)
 * RADIO
 * RRAMC (Resistive RAM Controller)
-* RTC (Real Time Counter)
 * TEMP (Temperature sensor)
 * TIMER
 * UARTE (UART with Easy DMA)