bump bsp to 3.4.0

Summary: This platform was left behind

Reviewed By: somasun

Differential Revision: D85812127

fbshipit-source-id: fe005121c9d4715d40a4de947340a355e7386433

Author: Scott8440

fboss/platform/configs/tahan800bc/platform_manager.json

@@ -1541,7 +1541,7 @@
   "chassisEepromDevicePath": "/SMB_FRU_SLOT@0/[IDPROM]",
   "numXcvrs": 33,
   "bspKmodsRpmName": "fboss_bsp_kmods",
-  "bspKmodsRpmVersion": "3.3.2-1",
+  "bspKmodsRpmVersion": "3.4.0-1",
   "requiredKmodsToLoad": [
     "i2c_i801",
     "spidev",