cmake: Fix case error passing extra CMake args to sub-projects

Bug in commit f4ea7c5a where the wrong variable case was used when passing
through to sub-projects

components/bootloader/project_include.cmake

@@ -110,7 +110,7 @@ externalproject_add(bootloader
                 # the bootloader common component requirements depends on this and
                 # config variables are not available before project() call.
                 -DLEGACY_INCLUDE_COMMON_HEADERS=${CONFIG_LEGACY_INCLUDE_COMMON_HEADERS}
-                ${EXTRA_CMAKE_ARGS}
+                ${extra_cmake_args}
     INSTALL_COMMAND ""
     BUILD_ALWAYS 1  # no easy way around this...
     BUILD_BYPRODUCTS ${bootloader_binary_files}

components/ulp/project_include.cmake

@@ -48,7 +48,7 @@ function(ulp_embed_binary app_name s_sources exp_dep_srcs)
                         -DIDF_PATH=${idf_path}
                         -DSDKCONFIG=${SDKCONFIG_HEADER}
                         -DPYTHON=${python}
-                        ${EXTRA_CMAKE_ARGS}
+                        ${extra_cmake_args}
             BUILD_COMMAND ${CMAKE_COMMAND} --build ${CMAKE_CURRENT_BINARY_DIR}/${app_name} --target build
             BUILD_BYPRODUCTS ${ulp_artifacts} ${ulp_artifacts_extras} ${ulp_ps_sources}
                             ${CMAKE_CURRENT_BINARY_DIR}/${app_name}/${app_name}
@@ -68,4 +68,4 @@ function(ulp_embed_binary app_name s_sources exp_dep_srcs)
         target_linker_script(${COMPONENT_LIB} INTERFACE ${CMAKE_CURRENT_BINARY_DIR}/${app_name}/${app_name}.ld)
         target_add_binary_data(${COMPONENT_LIB} ${CMAKE_CURRENT_BINARY_DIR}/${app_name}/${app_name}.bin BINARY)
     endif()
-endfunction()
+endfunction()