sycl: fix multiple warnings in compiling sycl backend (#26713)
* Update norm.cpp
* Update helper.hpp
* Update im2col.cpp
* Update fattn-mkl.cpp
* Update element_wise.cpp
* Update fattn-mkl.cpp
* Update set_rows.cpp
* Update element_wise.cpp
* Update ggml-sycl.cpp
* Update ggml-sycl.cpp
* Update ggml-sycl.cpp
* Update ggml-sycl.cpp
* Update ggml-sycl.cpp
* Update norm.cpp
* Update CMakeLists.txt
* Update CMakeLists.txt
* Update CMakeLists.txt
* Update ggml-sycl.cpp