net: fill in MODULE_DESCRIPTION()s for ep93xxx_eth

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the Cirrus EP93xx ethernet driver.
Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://lore.kernel.org/r/20240123190332.677489-5-leitao@debian.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/cirrus/ep93xx_eth.c

@@ -868,5 +868,6 @@ static struct platform_driver ep93xx_eth_driver = {
 
 module_platform_driver(ep93xx_eth_driver);
 
+MODULE_DESCRIPTION("Cirrus EP93xx Ethernet driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:ep93xx-eth");