spi: stm32: delete stray tabs in stm32h7_spi_data_idleness()

These lines were indented one tab more than they should be.  Delete
the stray tabs.

Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Alain Volmat <alain.volmat@foss.st.com>
Reviewed-by: Clément Le Goffic <clement.legoffic@foss.st.com>
Link: https://patch.msgid.link/2033b9fa-7b0f-4617-b94e-7b0a51c5c4b1@sabinyo.mountain


Signed-off-by: Mark Brown <broonie@kernel.org>