common: Drop linux/bitops.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/spi/stm32_spi.c b/drivers/spi/stm32_spi.c
index 8071de0..4a0833b 100644
--- a/drivers/spi/stm32_spi.c
+++ b/drivers/spi/stm32_spi.c
@@ -13,6 +13,7 @@
 #include <reset.h>
 #include <spi.h>
 #include <dm/device_compat.h>
+#include <linux/bitops.h>
 #include <linux/delay.h>
 
 #include <asm/io.h>