spi: reduce device chip select limit again

The spi chipselect limit SPI_CS_CNT_MAX was raised with commit
2f8c7c3 ("spi: Raise limit on number of chip selects") from 4 to 16
to accommodate spi controllers with more than 4 chip selects, and then
later to 24 with commit 96893cd ("spi: Raise limit on number of
chip selects to 24").

Now that we removed SPI_CS_CNT_MAX limiting the chip selects of
controllers, we can reduce the amount of chip selects per device again
to 4, the original value.

Signed-off-by: Jonas Gorski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: KanjiMonster

include/linux/spi/spi.h

@@ -21,7 +21,7 @@
 #include <uapi/linux/spi/spi.h>
 
 /* Max no. of CS supported per spi device */
-#define SPI_CS_CNT_MAX 24
+#define SPI_CS_CNT_MAX 4
 
 struct dma_chan;
 struct software_node;