params: fix golint warnings (#16853)

cmd/faucet/faucet.go

cmd/puppeth/genesis.go

cmd/puppeth/module_dashboard.go

cmd/puppeth/wizard_faucet.go

cmd/puppeth/wizard_genesis.go

cmd/puppeth/wizard_node.go

cmd/puppeth/wizard_wallet.go

core/blockchain_test.go

core/tx_pool.go

core/types/transaction_signing.go

core/vm/runtime/runtime.go

internal/ethapi/api.go

light/txpool.go

miner/worker.go

params/config.go

params/denomination.go

params/gas_table.go

params/protocol_params.go

tests/block_test_util.go

tests/difficulty_test.go