spi: axi-spi-engine: remove p from struct spi_engine_message_state

The program pointer p in struct spi_engine_message_state in the AXI SPI
Engine controller driver was assigned but never read so it can be
removed.
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://msgid.link/r/20240304-mainline-axi-spi-engine-small-cleanups-v2-1-5b14ed729a31@baylibre.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-axi-spi-engine.c

@@ -82,8 +82,6 @@ struct spi_engine_program {
  * struct spi_engine_message_state - SPI engine per-message state
  */
 struct spi_engine_message_state {
-	/** @p: Instructions for executing this message. */
-	struct spi_engine_program *p;
 	/** @cmd_length: Number of elements in cmd_buf array. */
 	unsigned cmd_length;
 	/** @cmd_buf: Array of commands not yet written to CMD FIFO. */
@@ -543,7 +541,6 @@ static int spi_engine_transfer_one_message(struct spi_controller *host,
 
 	/* reinitialize message state for this transfer */
 	memset(st, 0, sizeof(*st));
-	st->p = p;
 	st->cmd_buf = p->instructions;
 	st->cmd_length = p->length;
 	msg->state = st;