SYCL: Add support for FLOOR,CEIL,ROUND and TRUNC unary operators (ggml-org#16613)

* SYCL: Add support for FLOOR,CEIL,ROUND and TRUNC unary operators

Clean up unrelated changes from previous commit

* Chore: remove empty lines and fix indentation

* Clean up: remove leftover blank lines and fix spacing

* chore: fix trailing whitespace and ensure final newline

* Cleanup: remove redundant declarations already defined in header

* Sync docs/ops.md with updated backend operation support

* docs: update ops.md after rebase

* docs: update ops.md - Vulkan supports SSM_CONV and SSM_SCAN

Author: safranowith

ggml/src/ggml-sycl/element_wise.cpp

@@ -1241,4 +1241,4 @@ void ggml_sycl_round(ggml_backend_sycl_context & ctx, ggml_tensor * dst) {
 void ggml_sycl_trunc(ggml_backend_sycl_context & ctx, ggml_tensor * dst) {
     scope_op_debug_print scope_dbg_print(__func__, dst, /*num_src=*/1);
     ggml_sycl_op_trunc(ctx, dst);
-}
+}