librem5_defconfig: enable hantro media staging driver

2 jobs for hantro in 67 minutes and 14 seconds
Status Job ID Name Coverage
  Build
failed #329628
librem5 allowed to fail
build:aarch64

00:36:35

passed #329629
librem5:arm64
build:deb

01:07:12

 
Name Stage Failure
failed
build:aarch64 Build
  CC [M]  net/mac80211/debugfs_netdev.o
CC [M] net/mac80211/debugfs_key.o
CC [M] net/mac80211/pm.o
CC [M] net/mac80211/rc80211_minstrel.o
CC [M] net/mac80211/rc80211_minstrel_ht.o
CC [M] net/mac80211/rc80211_minstrel_debugfs.o
CC [M] net/mac80211/rc80211_minstrel_ht_debugfs.o
LD [M] net/mac80211/mac80211.o
ERROR: Job failed: exit code 1