cmake: do not set CMAKE_SKIP_INSTALL_RULES to ON

This CMakeLists.txt is added via add_subdirectory() to the app's
CMakeLists.txt. If the app-CMakeLists.txt has install() rules and
wants to use them, setting CMAKE_SKIP_INSTALL_RULES to ON breaks
the 'make install' call.

Not setting this variable does not harm zephyr because zephyr does
not use install().

Signed-off-by: Patrick Boettcher <[email protected]>

Author: pboettch

CMakeLists.txt

@@ -17,9 +17,6 @@ enable_language(C CXX ASM)
 check_c_compiler_flag("" toolchain_is_ok)
 assert(toolchain_is_ok "The toolchain is unable to build a dummy C file. See CMakeError.log.")
 
-# Do not generate make install target.
-set(CMAKE_SKIP_INSTALL_RULES ON)
-
 set(CMAKE_EXECUTABLE_SUFFIX .elf)
 
 set(SOC_NAME ${CONFIG_SOC})