spi: sunplus: sp7021: Clean up coding style

spi: sunplus: sp7021: Clean up coding style

This patch tidies up minor coding style deviations within the Sunplus SP7021 SPI driver, ensuring closer adherence to established kernel coding guidelines.

Specifically, it addresses:
- Correction of a whitespace inconsistency before a comma in `writel()` calls.
- Alignment of function parameter indentation for `struct spi_transfer *xfer` in `sp7021_spi_host_transfer_one()` and `sp7021_spi_target_transfer_one()`.

While purely cosmetic, these adjustments contribute to improved code readability and maintainability, making future development and review easier.

Signed-off-by: Darshan R. <rathod.darshan.0896@gmail.com>
Link: https://patch.msgid.link/20250728124104.6370-1-rathod.darshan.0896@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>