fix: properly resolve component dependencies

There is currently a bug in the __build_resolve_and_add_req function in
tools/cmake/build.cmake where the check for registered component
requirements is incorrectly applied to the component itself rather than
its dependencies. This issue likely originated from a typo, using
component_target instead of _component_target. To prevent further
confusion, _component_target has been renamed to _req_target.

Fixing this revealed multiple incorrect dependencies for the Linux
target, which have now been resolved by explicitly specifying the
dependencies for the Linux target.

Closes https://github.com/espressif/esp-idf/issues/13447

Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>

components/esp_driver_cam/CMakeLists.txt

@@ -1,3 +1,5 @@
+idf_build_get_property(target IDF_TARGET)
+
 set(srcs "esp_cam_ctlr.c")
 
 set(include "include" "interface")
@@ -7,7 +9,13 @@ if(CONFIG_SOC_MIPI_CSI_SUPPORTED)
     list(APPEND include "csi/include")
 endif()
 
+if(${target} STREQUAL "linux")
+    set(priv_requires "")
+else()
+    set(priv_requires esp_mm)
+endif()
+
 idf_component_register(SRCS ${srcs}
                        INCLUDE_DIRS ${include}
-                       PRIV_REQUIRES esp_mm
+                       PRIV_REQUIRES "${priv_requires}"
                       )