reset: fix BIT macro reference

RESET_CONTROL_FLAGS_BIT_* macros use BIT(), but reset.h does not
include bits.h. This causes compilation errors when including
reset.h standalone.

Include bits.h to make reset.h self-contained.

Suggested-by: Troy Mitchell <[e-mail]>
Reviewed-by: Troy Mitchell <[e-mail]>
Reviewed-by: Philipp Zabel <[e-mail]>
Signed-off-by: Encrow Thorne <[e-mail]>
Signed-off-by: Philipp Zabel <[e-mail]>

include/linux/reset.h

···
 #ifndef _LINUX_RESET_H_
 #define _LINUX_RESET_H_
 
+#include <linux/bits.h>
 #include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/types.h>