phy: broadcom: add missing MODULE_DESCRIPTION() macros

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/phy/broadcom/phy-bcm-ns-usb2.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/phy/broadcom/phy-bcm-ns-usb3.o

Add the missing invocations of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240608-md-drivers-phy-broadcom-v1-1-f070f84cc3f0@quicinc.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/broadcom/phy-bcm-ns-usb2.c

@@ -162,4 +162,5 @@ static struct platform_driver bcm_ns_usb2_driver = {
 };
 module_platform_driver(bcm_ns_usb2_driver);
 
+MODULE_DESCRIPTION("Broadcom Northstar USB 2.0 PHY Driver");
 MODULE_LICENSE("GPL v2");

drivers/phy/broadcom/phy-bcm-ns-usb3.c

@@ -240,5 +240,6 @@ static struct mdio_driver bcm_ns_usb3_mdio_driver = {
 
 mdio_module_driver(bcm_ns_usb3_mdio_driver);
 
+MODULE_DESCRIPTION("Broadcom Northstar USB 3.0 PHY Driver");
 MODULE_LICENSE("GPL v2");
 MODULE_DEVICE_TABLE(of, bcm_ns_usb3_id_table);