spi: rzv2h-rspi: remove call to spi_finalize_current_transfer()

spi: rzv2h-rspi: remove call to spi_finalize_current_transfer()

A call to spi_finalize_current_transfer() is only needed when the SPI
transfer is completed outside of the current context, when the
.transfer_one() implementation returns > 0.

Since the SPI transfer is completed in the current context, and we
return 0 from .transfer_one(), the SPI core assumes that the transfer
has completed and it does not wait for the completion variable that
would be set by a call to spi_finalize_current_transfer().

Remove the call to spi_finalize_current_transfer().

Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Link: https://patch.msgid.link/20251201134229.600817-3-cosmin-gabriel.tanislav.xa@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>