ncs: nrf_wifi: Update RPU patch to rev#4e1fb1bc47b

  UMAC:
      [SHEL-3829] : Throughput drops at down range RVR.
      [SHEL-3877] : Channel 100 unsupported in SoftAP mode even if
                    regulatory domain supports it.
      [SHEL-3878] : WPS (PIN/PBC) connection issue where Auth event getting
                    dropped in RPU.
  LMAC:
      Allowing incoming probe requests for P2P mode.
      Latest toolkit upgrade from 0.14.0 to 0.19.0.
      SQI changes.

Signed-off-by: Karun Kumar Eagalapati <[email protected]>

Author: karun2796