iwlwifi: mvm: fix sar profile printing issue

The profile shows an invalid value because the wrong format was used.
A u8 value should use by %hhu, not %hhd.  Fix thisit by changing it to
%hhu.
Signed-off-by: NJanie Tu <janiex.tu@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201209231352.a595be52af22.I1843c3c4f9fb32fa8d439052bd0a5ad230f292e2@changeidSigned-off-by: NLuca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c

@@ -381,10 +381,10 @@ static ssize_t iwl_dbgfs_sar_geo_profile_read(struct file *file,
 		pos += scnprintf(buf + pos, bufsz - pos,
 				 "Use geographic profile %d\n", tbl_idx);
 		pos += scnprintf(buf + pos, bufsz - pos,
-				 "2.4GHz:\n\tChain A offset: %hhd dBm\n\tChain B offset: %hhd dBm\n\tmax tx power: %hhd dBm\n",
+				 "2.4GHz:\n\tChain A offset: %hhu dBm\n\tChain B offset: %hhu dBm\n\tmax tx power: %hhu dBm\n",
 				 value[1], value[2], value[0]);
 		pos += scnprintf(buf + pos, bufsz - pos,
-				 "5.2GHz:\n\tChain A offset: %hhd dBm\n\tChain B offset: %hhd dBm\n\tmax tx power: %hhd dBm\n",
+				 "5.2GHz:\n\tChain A offset: %hhu dBm\n\tChain B offset: %hhu dBm\n\tmax tx power: %hhu dBm\n",
 				 value[4], value[5], value[3]);
 	}
 	mutex_unlock(&mvm->mutex);