iwlwifi: pcie: gen2: minor code cleanups in byte table update

One line should be indented less, otherwise it looks like it
belongs into the parentheses, which clearly it doesn't; also
some variables can move into their respective if branches.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200417131727.a4858aa0441b.I0e70e4a5493fe6b8db6390f9349ff0e7888ab240@changeid

drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c

@@ -90,9 +90,7 @@ static void iwl_pcie_gen2_update_byte_tbl(struct iwl_trans_pcie *trans_pcie,
 					  struct iwl_txq *txq, u16 byte_cnt,
 					  int num_tbs)
 {
-	struct iwlagn_scd_bc_tbl *scd_bc_tbl = txq->bc_tbl.addr;
 	struct iwl_trans *trans = iwl_trans_pcie_get_trans(trans_pcie);
-	struct iwl_gen3_bc_tbl *scd_bc_tbl_gen3 = txq->bc_tbl.addr;
 	int idx = iwl_pcie_get_cmd_index(txq, txq->write_ptr);
 	u8 filled_tfd_size, num_fetch_chunks;
 	u16 len = byte_cnt;
@@ -102,7 +100,7 @@ static void iwl_pcie_gen2_update_byte_tbl(struct iwl_trans_pcie *trans_pcie,
 		return;
 
 	filled_tfd_size = offsetof(struct iwl_tfh_tfd, tbs) +
-				   num_tbs * sizeof(struct iwl_tfh_tb);
+			  num_tbs * sizeof(struct iwl_tfh_tb);
 	/*
 	 * filled_tfd_size contains the number of filled bytes in the TFD.
 	 * Dividing it by 64 will give the number of chunks to fetch
@@ -114,12 +112,16 @@ static void iwl_pcie_gen2_update_byte_tbl(struct iwl_trans_pcie *trans_pcie,
 	num_fetch_chunks = DIV_ROUND_UP(filled_tfd_size, 64) - 1;
 
 	if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
+		struct iwl_gen3_bc_tbl *scd_bc_tbl_gen3 = txq->bc_tbl.addr;
+
 		/* Starting from AX210, the HW expects bytes */
 		WARN_ON(trans_pcie->bc_table_dword);
 		WARN_ON(len > 0x3FFF);
 		bc_ent = cpu_to_le16(len | (num_fetch_chunks << 14));
 		scd_bc_tbl_gen3->tfd_offset[idx] = bc_ent;
 	} else {
+		struct iwlagn_scd_bc_tbl *scd_bc_tbl = txq->bc_tbl.addr;
+
 		/* Before AX210, the HW expects DW */
 		WARN_ON(!trans_pcie->bc_table_dword);
 		len = DIV_ROUND_UP(len, 4);