spi: stm32: Print summary 'callbacks suppressed' message

The original fix "spi: stm32: Rate-limit the 'Communication suspended' message"
still leads to "stm32h7_spi_irq_thread: 1696 callbacks suppressed" spew in the
kernel log. Since this 'Communication suspended' message is a debug print, add
RATELIMIT_MSG_ON_RELEASE flag to inhibit the "callbacks suspended" part during
normal operation and only print summary at the end.

Fixes: ea8be08c ("spi: stm32: Rate-limit the 'Communication suspended' message")
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20221018183513.206706-1-marex@denx.deSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-stm32.c

@@ -886,6 +886,7 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id)
 		static DEFINE_RATELIMIT_STATE(rs,
 					      DEFAULT_RATELIMIT_INTERVAL * 10,
 					      1);
+		ratelimit_set_flags(&rs, RATELIMIT_MSG_ON_RELEASE);
 		if (__ratelimit(&rs))
 			dev_dbg_ratelimited(spi->dev, "Communication suspended\n");
 		if (!spi->cur_usedma && (spi->rx_buf && (spi->rx_len > 0)))