spi: make class structs const

The two instances of struct class are only used here in functions that
take const pointers and so can too be made constant.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://patch.msgid.link/20241018122437.64275-1-brgl@bgdev.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
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Bartosz Golaszewski 2024-10-18 14:24:37 +02:00 • committed by Mark Brown
commit 36dbe4521a
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