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/mips/mach-jz47xx/jz4780/reset.c b/arch/mips/mach-jz47xx/jz4780/reset.c
index 73af347..bf6addc 100644
--- a/arch/mips/mach-jz47xx/jz4780/reset.c
+++ b/arch/mips/mach-jz47xx/jz4780/reset.c
@@ -9,6 +9,7 @@
 #include <config.h>
 #include <common.h>
 #include <asm/io.h>
+#include <linux/bitops.h>
 #include <mach/jz4780.h>
 
 /* WDT */