model : Add label for LFM2.5-230M (ggml-org#25008)

Author: tdakhran

src/llama-model.cpp

@@ -700,6 +700,7 @@ const char * llm_type_name(llm_type type) {
         case LLM_TYPE_160M:          return "160M";
         case LLM_TYPE_190M:          return "190M";
         case LLM_TYPE_220M:          return "220M";
+        case LLM_TYPE_230M:          return "230M";
         case LLM_TYPE_250M:          return "250M";
         case LLM_TYPE_256M:          return "256M";
         case LLM_TYPE_270M:          return "270M";

src/llama-model.h

@@ -36,6 +36,7 @@ enum llm_type {
     LLM_TYPE_160M,
     LLM_TYPE_190M,
     LLM_TYPE_220M,
+    LLM_TYPE_230M,
     LLM_TYPE_250M,
     LLM_TYPE_256M,
     LLM_TYPE_270M,

src/models/lfm2.cpp

@@ -13,6 +13,7 @@ void llama_model_lfm2::load_arch_hparams(llama_model_loader & ml) {
     hparams.n_layer_dense_lead = hparams.n_layer();
 
     switch (hparams.n_ff()) {
+        case  2560: type = LLM_TYPE_230M; break;
         case  4608: type = LLM_TYPE_350M; break;
         case  6912: type = LLM_TYPE_700M; break;
         case  8192: type = LLM_TYPE_1_2B; break;