cmake: CMake soc dir variable improvements for HWMv2

Create SOC_<soc>_DIR in addition to SOC_<SOC>_DIR variable.
Clear intermediate variables constructed by cmake_parse_arguments.

Set SOC_V2_DIR to point to the SoC dir of the actual SoC in use.

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>

cmake/modules/hwm_v2.cmake

@@ -78,6 +78,8 @@ while(TRUE)
     else()
       set(setting_name SOC_${HWM_TYPE}_${SOC_V2_NAME}_DIR)
     endif()
+    # We support both SOC_foo_DIR and SOC_FOO_DIR.
+    set(${setting_name} ${SOC_V2_DIR})
     string(TOUPPER ${setting_name} setting_name)
     set(${setting_name} ${SOC_V2_DIR})
   endif()
@@ -106,3 +108,10 @@ kconfig_gen("${KCONFIG_BINARY_DIR}/arch" "${arch_kconfig_file}" "${kconfig_arch_
 kconfig_gen("${KCONFIG_BINARY_DIR}/soc" "${soc_defconfig_file}" "${kconfig_soc_source_dir}")
 kconfig_gen("${KCONFIG_BINARY_DIR}/soc" "${soc_zephyr_file}" "${kconfig_soc_source_dir}")
 kconfig_gen("${KCONFIG_BINARY_DIR}/soc" "${soc_kconfig_file}" "${kconfig_soc_source_dir}")
+
+# Clear variables created by cmake_parse_arguments
+unset(SOC_V2_NAME)
+unset(SOC_V2_DIR)
+unset(SOC_V2_HWM)
+unset(ARCH_V2_NAME)
+unset(ARCH_V2_DIR)

cmake/modules/soc_v2.cmake

@@ -26,4 +26,5 @@ if(HWMv2)
   set(SOC_SERIES ${CONFIG_SOC_SERIES})
   set(SOC_TOOLCHAIN_NAME ${CONFIG_SOC_TOOLCHAIN_NAME})
   set(SOC_FAMILY ${CONFIG_SOC_FAMILY})
+  set(SOC_V2_DIR ${SOC_${SOC_NAME}_DIR})
 endif()