iwlwifi: add hw revision for 6000g2 NIC

Add hardware revision for 6000g2 series of NIC
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

drivers/net/wireless/iwlwifi/iwl-csr.h

@@ -298,6 +298,7 @@
 #define CSR_HW_REV_TYPE_1000           (0x0000060)
 #define CSR_HW_REV_TYPE_6x00           (0x0000070)
 #define CSR_HW_REV_TYPE_6x50           (0x0000080)
+#define CSR_HW_REV_TYPE_6x00g2         (0x00000B0)
 #define CSR_HW_REV_TYPE_NONE           (0x00000F0)
 
 /* EEPROM REG */