usb: gadget: omap_udc: remove unused variable

The driver_desc variable is only used in some configurations:

drivers/usb/gadget/udc/omap_udc.c:113:19: error: unused variable 'driver_desc' [-Werror,-Wunused-const-variable]

Since there is only ever one user of it, just open-code the string in place
and remove the global variable and the macro behind it. This also helps
grep for the MODULE_DESCRIPTION string.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20240403080702.3509288-26-arnd@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/udc/omap_udc.c

@@ -56,7 +56,6 @@
 /* ISO too */
 #define	USE_ISO
 
-#define	DRIVER_DESC	"OMAP UDC driver"
 #define	DRIVER_VERSION	"4 October 2004"
 
 #define OMAP_DMA_USB_W2FC_TX0		29
@@ -110,7 +109,6 @@ MODULE_PARM_DESC(use_dma, "enable/disable DMA");
 
 
 static const char driver_name[] = "omap_udc";
-static const char driver_desc[] = DRIVER_DESC;
 
 /*-------------------------------------------------------------------------*/
 
@@ -2299,13 +2297,11 @@ static int proc_udc_show(struct seq_file *s, void *_)
 
 	spin_lock_irqsave(&udc->lock, flags);
 
-	seq_printf(s, "%s, version: " DRIVER_VERSION
+	seq_printf(s, "OMAP UDC driver, version: " DRIVER_VERSION
 #ifdef	USE_ISO
 		" (iso)"
 #endif
-		"%s\n",
-		driver_desc,
-		use_dma ?  " (dma)" : "");
+		"%s\n", use_dma ?  " (dma)" : "");
 
 	tmp = omap_readw(UDC_REV) & 0xff;
 	seq_printf(s,
@@ -2994,6 +2990,6 @@ static struct platform_driver udc_driver = {
 
 module_platform_driver(udc_driver);
 
-MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_DESCRIPTION("OMAP UDC driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:omap_udc");