xl: Quit early when EC config is incorrect (#16390)

Co-authored-by: Anis Elleuch <anis@min.io>

internal/config/storageclass/storage-class.go

@@ -304,12 +304,7 @@ func LookupConfig(kvs config.KVS, setDriveCount int) (cfg Config, err error) {
 	// Validation is done after parsing both the storage classes. This is needed because we need one
 	// storage class value to deduce the correct value of the other storage class.
 	if err = validateParity(cfg.Standard.Parity, cfg.RRS.Parity, setDriveCount); err != nil {
-		cfg.RRS.Parity = defaultRRSParity
-		if setDriveCount == 1 {
-			cfg.RRS.Parity = 0
-		}
-		cfg.Standard.Parity = DefaultParityBlocks(setDriveCount)
-		return cfg, err
+		return Config{}, err
 	}
 
 	return cfg, nil