bitops.h: Include bitsperlong.h as needed for GENMASK_ULL

The macro GENMASK_ULL needs the BITS_PER_LONG_LONG macro which is
defined in the bitsperlong.h header. Lets include this header as
the upcoming A7k/8k support in the Marvell mvpp2 ethernet driver
uses this macro.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>

include/linux/bitops.h

@@ -2,6 +2,7 @@
 #define _LINUX_BITOPS_H
 
 #include <asm/types.h>
+#include <asm-generic/bitsperlong.h>
 #include <linux/compiler.h>
 
 #define BIT(nr)			(1UL << (nr))