Fix checkpatch error:

  ERROR: open brace '{' following function definitions go on the next line
  #545: FILE: spi-dln2.c:545:
  +static int dln2_spi_rdwr(struct dln2_spi *dln2, const u8 *tx_data,
  +			 u8 *rx_data, u16 data_len, u8 attr) {
Signed-off-by: Jay Fang <f.fangjian@huawei.com>
Link: https://lore.kernel.org/r/1616566602-13894-7-git-send-email-f.fangjian@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>