Remove the unused DBG_VALUE offset parameter from RegAllocFast (NFC)
Remove the unused DBG_VALUE offset parameter from RegAllocFast (NFC)

Followup to r309426.
rdar://problem/33580047

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@309446 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 9a729b3c67b0b9aab34f8bfe6e1f9b82c6f51946)

apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm