at86rf230: add missing cca ed level values

This patch add missing values for at86rf212 ed level values. Currently
there are 15 values and the register setting supports 16 different ed
level values.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reported-by: Craig Younkins <craig@freshtemp.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/net/ieee802154/at86rf230.c

@@ -892,12 +892,12 @@ static const s32 at86rf23x_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {
 
 static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1] = {
 	-10000, -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200,
-	-8000, -7800, -7600, -7400, -7200,
+	-8000, -7800, -7600, -7400, -7200, -7000,
 };
 
 static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1] = {
 	-9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000,
-	-7800, -7600, -7400, -7200, -7000,
+	-7800, -7600, -7400, -7200, -7000, -6800,
 };
 
 static inline int