remove ath9k from REMOVED_FOR_HUP_SPACE

Changelog-entry: user needs to use ath9k, re-adding the firmware into the image
Signed-off-by: Yann CARDAILLAC <yann.cardaillac@balena.io>

Author: ycardaillac

layers/meta-balena-raspberrypi/recipes-core/packagegroups/packagegroup-balena-connectivity.bbappend

@@ -46,7 +46,6 @@ REMOVED_FOR_HUP_SPACE = " \
     linux-firmware-rtl8821 \
     linux-firmware-rtl8723b-bt \
     linux-firmware-ralink-nic \
-    linux-firmware-ath9k \
     linux-firmware-rtl8192cu \
     linux-firmware-rtl8192su \
     linux-firmware-bcm43143 \