net: linkmode: add linkmode_fill() helper

Add a linkmode_fill() helper, which will allow us to convert phylink's
open coded bitmap_fill() operations.

Signed-off-by: Russell King (Oracle) <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/linux/linkmode.h

···
 	bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 }
 
+static inline void linkmode_fill(unsigned long *dst)
+{
+	bitmap_fill(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+
 static inline void linkmode_copy(unsigned long *dst, const unsigned long *src)
 {
 	bitmap_copy(dst, src, __ETHTOOL_LINK_MODE_MASK_NBITS);