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_uart/CMakeLists.txt

@@ -1,13 +1,21 @@
+idf_build_get_property(target IDF_TARGET)
+
 set(srcs)
 set(public_include "include")
 if(CONFIG_SOC_UART_SUPPORTED)
     list(APPEND srcs "src/uart.c")
 endif()
 
+if(${target} STREQUAL "linux")
+    set(priv_requires esp_ringbuf)
+else()
+    set(priv_requires esp_pm esp_driver_gpio esp_ringbuf)
+endif()
+
 idf_component_register(
     SRCS ${srcs}
     INCLUDE_DIRS ${public_include}
-    PRIV_REQUIRES esp_pm esp_driver_gpio esp_ringbuf
+    PRIV_REQUIRES "${priv_requires}"
     LDFRAGMENTS "linker.lf"
 )