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/arch/arm/mach-socfpga/misc_gen5.c b/arch/arm/mach-socfpga/misc_gen5.c
index 39acc8c..7209e8d 100644
--- a/arch/arm/mach-socfpga/misc_gen5.c
+++ b/arch/arm/mach-socfpga/misc_gen5.c
@@ -10,6 +10,7 @@
 #include <env.h>
 #include <errno.h>
 #include <fdtdec.h>
+#include <linux/bitops.h>
 #include <linux/libfdt.h>
 #include <altera.h>
 #include <miiphy.h>