net: fill in MODULE_DESCRIPTION()s for CAIF

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to all the CAIF sub-modules.

Link: https://lore.kernel.org/r/20240104144855.1320993-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/caif/caif_dev.c

@@ -27,6 +27,7 @@
 #include <net/caif/cfcnfg.h>
 #include <net/caif/cfserl.h>
 
+MODULE_DESCRIPTION("ST-Ericsson CAIF modem protocol support");
 MODULE_LICENSE("GPL");
 
 /* Used for local tracking of the CAIF net devices */

net/caif/caif_socket.c

@@ -27,6 +27,7 @@
 #include <net/caif/caif_dev.h>
 #include <net/caif/cfpkt.h>
 
+MODULE_DESCRIPTION("ST-Ericsson CAIF modem protocol socket support (AF_CAIF)");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_NETPROTO(AF_CAIF);
 

net/caif/caif_usb.c

@@ -20,6 +20,7 @@
 #include <net/caif/cfpkt.h>
 #include <net/caif/cfcnfg.h>
 
+MODULE_DESCRIPTION("ST-Ericsson CAIF modem protocol USB support");
 MODULE_LICENSE("GPL");
 
 #define CFUSB_PAD_DESCR_SZ 1	/* Alignment descriptor length */

net/caif/chnl_net.c

@@ -31,6 +31,7 @@
 /*This list is protected by the rtnl lock. */
 static LIST_HEAD(chnl_net_list);
 
+MODULE_DESCRIPTION("ST-Ericsson CAIF modem protocol GPRS network device");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_RTNL_LINK("caif");