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