vulkan: change an assertion and minify others

ggml/src/ggml-vulkan/ggml-vulkan.cpp

@@ -3929,13 +3929,13 @@ static vk_pipeline ggml_vk_op_get_pipeline(ggml_backend_vk_context * ctx, const
         }
         return nullptr;
     case GGML_OP_SOFT_MAX:
-        GGML_ASSERT(!src1 || src1->type == GGML_TYPE_F32 || src1->type == GGML_TYPE_F16);
-
-        if (src0->type == GGML_TYPE_F32 && (src1 == nullptr || src1->type == GGML_TYPE_F32) && dst->type == GGML_TYPE_F32) {
-            return ctx->device->pipeline_soft_max_f32;
-        }
-        if (src0->type == GGML_TYPE_F32 && src1->type == GGML_TYPE_F16 && dst->type == GGML_TYPE_F32) {
-            return ctx->device->pipeline_soft_max_f32_f16;
+        if (src0->type == GGML_TYPE_F32 && dst->type == GGML_TYPE_F32) {
+            if (src1 == nullptr || src1->type == GGML_TYPE_F32) {
+                return ctx->device->pipeline_soft_max_f32;
+            }
+            else if (src1->type == GGML_TYPE_F16) {
+                return ctx->device->pipeline_soft_max_f32_f16;
+            }
         }
         return nullptr;
     case GGML_OP_ROPE: