[Misc][Refactor] Generalize linear_method to be quant_method (#4373)

vllm/model_executor/layers/quantization/__init__.py

@@ -4,7 +4,7 @@ from vllm.model_executor.layers.quantization.aqlm import AQLMConfig
 from vllm.model_executor.layers.quantization.awq import AWQConfig
 from vllm.model_executor.layers.quantization.base_config import (
     QuantizationConfig)
-from vllm.model_executor.layers.quantization.fp8 import FP8Config
+from vllm.model_executor.layers.quantization.fp8 import Fp8Config
 from vllm.model_executor.layers.quantization.gptq import GPTQConfig
 from vllm.model_executor.layers.quantization.marlin import MarlinConfig
 from vllm.model_executor.layers.quantization.squeezellm import SqueezeLLMConfig
@@ -12,7 +12,7 @@ from vllm.model_executor.layers.quantization.squeezellm import SqueezeLLMConfig
 QUANTIZATION_METHODS = {
     "aqlm": AQLMConfig,
     "awq": AWQConfig,
-    "fp8": FP8Config,
+    "fp8": Fp8Config,
     "gptq": GPTQConfig,
     "squeezellm": SqueezeLLMConfig,
     "marlin": MarlinConfig,