Revert "[nrf noup] modules: hal_nordic: require nrf-regtool"

This reverts commit 662e647.

Signed-off-by: Krzysztof Chruściński <[email protected]>

Author: nordic-krch

modules/hal_nordic/CMakeLists.txt

@@ -13,7 +13,6 @@ if(CONFIG_NRF_REGTOOL_GENERATE_UICR)
 endif()
 if(DEFINED nrf_regtool_components)
   find_package(nrf-regtool 9.1.0
-    REQUIRED
     COMPONENTS ${nrf_regtool_components}
     PATHS ${CMAKE_CURRENT_LIST_DIR}/nrf-regtool
     NO_CMAKE_PATH