[PATCH for-4.20] spi: bcm2835: Unbreak the build of esoteric configs

[Lukas Wunner <lukas@xxxxxxxxx>]

Commit e82b0b382845 ("spi: bcm2835: Fix race on DMA termination") broke
the build with COMPILE_TEST=y on arches whose cmpxchg() requires 32-bit
operands (xtensa, older arm ISAs).

Unfortunately the commit was applied despite prior warning that it needs
to be respun:
https://marc.info/?l=linux-spi&m=154186019626675&w=2

Fix by changing the dma_pending flag's type from bool to unsigned int.

Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
Fixes: e82b0b382845 ("spi: bcm2835: Fix race on DMA termination")
Cc: Frank Pavlic <f.pavlic@xxxxxxxxx>
Cc: Martin Sperl <kernel@xxxxxxxxxxxxxxxx>
Cc: Noralf Trønnes <noralf@xxxxxxxxxxx>
---
 drivers/spi/spi-bcm2835.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index 774161b..25abf2d 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -88,7 +88,7 @@ struct bcm2835_spi {
 	u8 *rx_buf;
 	int tx_len;
 	int rx_len;
-	bool dma_pending;
+	unsigned int dma_pending;
 };
 
 static inline u32 bcm2835_rd(struct bcm2835_spi *bs, unsigned reg)
-- 
2.19.2