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/gpio/gpio-rza1.c b/drivers/gpio/gpio-rza1.c
index ce2453e..21a87d6 100644
--- a/drivers/gpio/gpio-rza1.c
+++ b/drivers/gpio/gpio-rza1.c
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <asm/gpio.h>
 #include <asm/io.h>
+#include <linux/bitops.h>
 
 #define P(bank)			(0x0000 + (bank) * 4)
 #define PSR(bank)		(0x0100 + (bank) * 4)