rt2800: 5592: early defines

Add basic defines for 5592 chip. It can not be enabled until
CONFIG_RT2800USB_RT55XX configuration option will be provided in the
Kconfig.

Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Tested-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 182e598..45f58c9 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -4863,6 +4863,7 @@
 	case RT3572:
 	case RT5390:
 	case RT5392:
+	case RT5592:
 		break;
 	default:
 		ERROR(rt2x00dev, "Invalid RT chipset 0x%04x detected.\n", rt2x00dev->chip.rt);
@@ -4887,6 +4888,7 @@
 	case RF5372:
 	case RF5390:
 	case RF5392:
+	case RF5592:
 		break;
 	default:
 		ERROR(rt2x00dev, "Invalid RF chipset 0x%04x detected.\n",