Update Intel OPA hfi1 firmware

Update dc firmware to production signed 1.26.1
Update version numbers in WHENCE file
Signed-off-by: John Fleck <john.fleck@intel.com>

WHENCE

@@ -3740,7 +3740,7 @@ License: Redistributable. See LICENSE.atmel for details
 Driver: hfi1 - Intel OPA Gen 1 adapter
 
 File: hfi1_dc8051.fw
-Version: 1.24.0
+Version: 1.26.1
 File: hfi1_fabric.fw
 Version: 0x1055
 File: hfi1_pcie.fw