[ofw] error trying to load filter driver

[Sean Hefty]

I'm unable to load the winverbs filter driver on x64 systems.  The driver loads
and works fine on x86.  The error from the debugger is:

PipCallDriverAddDevice:	Unable to reference driver \Driver\WinVerbs (c000026c)

It's the correct driver build, with the correct wdf coinstallers.  If anyone has
any ideas, I'm looking for them. :)

A more detailed debug log is below.

- Sean

-----

UMPNPMGR: Processing DeviceInstallEvent for
PCI\VEN_15B3&DEV_6278&SUBSYS_627815B3&REV_A0\4&27b69ee5&0&0030
PipCallDriverAddDevice: Processing devnode 0x9b603730
PipCallDriverAddDevice: DevNode flags going in = 0x000230
PipCallDriverAddDevice:	Will load driver
PipCallDriverAddDevice:	Opening registry key
PCI\VEN_15B3&DEV_6278&SUBSYS_627815B3&REV_A0\4&27b69ee5&0&0030
PipCallDriverAddDevice:		Class GUID is
{58517E00-D3CF-40C9-A679-CEE5752F4491}
PipCallDriverAddDevice:	Unable to open GUID\Properties key
{58517E00-D3CF-40C9-A679-CEE5752F4491} - 0xc0000034
PipCallDriverAddDevice:		Value Service [Type 1, Len 12] @ 0x19e7608
PipCallDriverAddDevice:			Service Name mthca
PipCallDriverAddDevice:			DriverName is \Driver\mthca
PiNotifyUserMode: User-mode returned, status = 0x00000000, status1 = 0x00000000,
Result = 0x00000001
PpCompleteDeviceEvent: Completing queued event - EventGuid =
GUID_DEVICE_ENUMERATED with 00000000
[Info][SdbGetDatabaseMatch           ] Looking for
"\SystemRoot\system32\DRIVERS\mthca.sys"
[Info][SdbGetIndex                   ] index 0x7007(0x600b) was not found in the
index table
[Info][SdbpSearchDB                  ] SdbFindFirstStringIndexedTag failed to
locate exe: "mthca.sys".
[Info][SdbGetIndex                   ] index 0x7007(0x600b) was not found in the
index table
PipCallDriverAddDevice:			Driver Reference 0x999d1310
PipCallDriverAddDevice:		Value UpperFilters [Type 1, Len 18] @ 0x19e7610
PipCallDriverAddDevice:			Service Name WinVerbs
PipCallDriverAddDevice:			DriverName is \Driver\WinVerbs
PipCallDriverAddDevice:			Unable to reference driver
\Driver\WinVerbs (c000026c)
PipCallDriverAddDevice: Error 0xc000026c while building driver load list
PipCallDriverAddDevice: DevNode flags leaving = 0x002230
PipCallDriverAddDevice: Cleaning up
~0:[MTHCA] pa_cash_print() :pa_cash_print: max_nr_pages 67108864 (0x4000000),
cur_nr_pages  0 (0), free_list_hdr 0, free_threshold 256
****** Unloaded driver (mthca)
PipCallDriverAddDevice: Returning status 0xc000026c
IbCoInstaller called DI_FUNCTION =12