#14590: Move sfpi off LFS (#14758)

Remove tt_metal/third_party/sfpi submodule.
Add smarts to tt_metal/hw to download sfpi release into runtome/sfpi

### Ticket
#14590

### Problem description
LFS bad, don't use it.

### What's changed
New reorg and release mechanism for sfpi -- see 
tenstorrent/sfpi#24

Remove tt_metal/third_party/sfpi submodule
Add smarts to tt_metal/hw to lazily fetch a specific sfpi release (this
patch names v0.0.0-lfsectomy, once we're set I'll create v12.0.0 --
numbering them after the GCC major/minor version numbering and use the
micro number for our own updates.

### Checklist
- [YES] Post commit CI passes
- [ ] Blackhole Post commit (if applicable)
- [ ] Model regression CI testing passes (if applicable)
- [ ] Device performance regression CI testing passes (if applicable)
- [ ] New/Existing tests provide coverage for changes

---------

Co-authored-by: Raymond Kim <[email protected]>

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "src/ckernels/sfpi"]
-	path = tt_metal/third_party/sfpi
-	url = https://github.com/tenstorrent-metal/sfpi-rel-temp.git
 [submodule "third_party/pybind11"]
 	path = tt_metal/third_party/pybind11
 	url = https://github.com/pybind/pybind11.git

tt_metal/hw/CMakeLists.txt

@@ -18,6 +18,17 @@ set(TYPES
     kernel
 )
 
+include(FetchContent)
+FetchContent_Declare(
+    sfpi
+    URL
+        https://github.com/tenstorrent/sfpi/releases/download/v5.0.0/sfpi-release.tgz
+    URL_HASH MD5=10cacabe92846076cb4d7596e46d06be
+    SOURCE_DIR
+    ${PROJECT_SOURCE_DIR}/runtime/sfpi
+)
+FetchContent_MakeAvailable(sfpi)
+
 foreach(ARCH IN LISTS ARCHS)
     set(DEV_MEM_MAP "${PROJECT_SOURCE_DIR}/tt_metal/hw/inc/${ARCH}/dev_mem_map.h")
     set(HW_INCLUDES "${PROJECT_SOURCE_DIR}/tt_metal/hw/inc/${ARCH}")
@@ -63,7 +74,7 @@ function(get_alias INPUT_STRING OUTPUT_VAR)
 endfunction()
 
 # Define the compiler command
-set(GPP_CMD ${PROJECT_SOURCE_DIR}/tt_metal/third_party/sfpi/compiler/bin/riscv32-unknown-elf-g++)
+set(GPP_CMD ${PROJECT_SOURCE_DIR}/runtime/sfpi/compiler/bin/riscv32-unknown-elf-g++)
 
 set(GPP_DEFINES -DTENSIX_FIRMWARE)
 

tt_metal/jit_build/build.cpp

@@ -53,7 +53,7 @@ void JitBuildEnv::init(uint32_t build_key, tt::ARCH arch, const std::map<std::st
     this->out_kernel_root_ = this->out_root_ + to_string(build_key) + "/kernels/";
 
     // Tools
-    this->gpp_ = this->root_ + "tt_metal/third_party/sfpi/compiler/bin/riscv32-unknown-elf-g++ ";
+    this->gpp_ = this->root_ + "runtime/sfpi/compiler/bin/riscv32-unknown-elf-g++ ";
 
     // Flags
     string common_flags;
@@ -294,8 +294,8 @@ JitBuildCompute::JitBuildCompute(const JitBuildEnv& env, const JitBuiltStateConf
                       env_.root_ + "tt_metal/hw/ckernels/" + env.arch_name_ + "/metal/common " + "-I" + env_.root_ +
                       "tt_metal/hw/ckernels/" + env.arch_name_ + "/metal/llk_io " + "-I" + env_.root_ +
                       "tt_metal/hw/ckernels/" + env.arch_name_ + "/metal/llk_api " + "-I" + env_.root_ +
-                      "tt_metal/hw/ckernels/" + env.arch_name_ + "/metal/llk_api/llk_sfpu " + "-I" + env_.root_ +
-                      "tt_metal/third_party/sfpi/include " + "-I" + env_.root_ + "tt_metal/hw/firmware/src " + "-I" +
+                      "tt_metal/hw/ckernels/" + env.arch_name_ + "/metal/llk_api/llk_sfpu " + "-I" +
+                      env_.root_ + "runtime/sfpi/include " + "-I" + env_.root_ + "tt_metal/hw/firmware/src " + "-I" +
                       env_.root_ + "tt_metal/third_party/tt_llk_" + env.arch_name_ + "/llk_lib ";
 
     if (this->is_fw_) {