staging: gpib: fix prefixing 0x with decimal output

- pr_err() of pc2a_common_attach() in pc2_gpib uses 0x%d.
- The config->ibbase is of u32 and correct prefix is 0x%x.
- This error reported by checkpatch with below message:
  ERROR: Prefixing 0x with decimal output is defective

Signed-off-by: Ajith P V <ajithpv.linux@gmail.com>
Link: https://lore.kernel.org/r/20250122075545.33146-1-ajithpv.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gpib/pc2/pc2_gpib.c

@@ -505,7 +505,7 @@ static int pc2a_common_attach(gpib_board_t *board, const gpib_board_config_t *co
 	case 0x62e1:
 		break;
 	default:
-		pr_err("PCIIa base range invalid, must be one of 0x[0246]2e1, but is 0x%d\n",
+		pr_err("PCIIa base range invalid, must be one of 0x[0246]2e1, but is 0x%x\n",
 		       config->ibbase);
 		return -1;
 	}