dmaengine: ti: add missing MODULE_DESCRIPTION() macros

With ARCH=arm64, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/dma/ti/k3-udma.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/dma/ti/k3-udma-glue.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/dma/ti/k3-psil-lib.o

Add the missing invocations of the MODULE_DESCRIPTION() macro.

Signed-off-by: Jeff Johnson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/ti/k3-psil.c

···
 	return 0;
 }
 EXPORT_SYMBOL_GPL(psil_set_new_ep_config);
+MODULE_DESCRIPTION("K3 PSI-L endpoint configuration");
 MODULE_LICENSE("GPL v2");

drivers/dma/ti/k3-udma-glue.c

···
 }
 
 module_init(k3_udma_glue_class_init);
+MODULE_DESCRIPTION("TI K3 NAVSS DMA glue interface");
 MODULE_LICENSE("GPL v2");

drivers/dma/ti/k3-udma.c

···
 };
 
 module_platform_driver(udma_driver);
+MODULE_DESCRIPTION("Texas Instruments UDMA support");
 MODULE_LICENSE("GPL v2");
 
 /* Private interfaces to UDMA */