Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/uwb/lc-rc.c b/drivers/uwb/lc-rc.c
index b0091c7..b4395f4 100644
--- a/drivers/uwb/lc-rc.c
+++ b/drivers/uwb/lc-rc.c
@@ -168,7 +168,7 @@
 	}
 
 	if (uwb_mac_addr_unset(&addr) || uwb_mac_addr_bcast(&addr)) {
-		addr.data[0] = 0x02; /* locally adminstered and unicast */
+		addr.data[0] = 0x02; /* locally administered and unicast */
 		get_random_bytes(&addr.data[1], sizeof(addr.data)-1);
 
 		result = uwb_rc_mac_addr_set(rc, &addr);