net: fill in MODULE_DESCRIPTION()s for ds26522 module

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to Slic Maxim ds26522 card driver.
Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://lore.kernel.org/r/20240108181610.2697017-9-leitao@debian.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/wan/slic_ds26522.c

@@ -28,6 +28,7 @@
 
 static struct spi_device *g_spi;
 
+MODULE_DESCRIPTION("Slic Maxim DS26522 driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Zhao Qiang<B45475@freescale.com>");