rimage/cmake: add find_package(OpenSSL 3 ...)

Support unusual locations and deprecates OpenSSL 1 (as previously
attempted in thesofproject/rimage#157)

Will remove the OpenSSL 1 code later to give people some time to
upgrade.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>

tools/rimage/CMakeLists.txt

@@ -59,7 +59,8 @@ if(${CMAKE_HOST_WIN32})
 	endif()
 endif()
 
-target_link_libraries(rimage PRIVATE crypto)
+find_package(OpenSSL 3...3.9999 REQUIRED)
+target_link_libraries(rimage PRIVATE OpenSSL::Crypto)
 
 target_include_directories(rimage PRIVATE
 	src/include/