Remove max check for vlut
Remove max check for vlut

vlut helper function can handle max >= 256.
Remove the unnecessary check.

Conflicts:
	src/CodeGen_Hexagon.cpp

Former-commit-id: 9aac4bf4ce122616e88efa532ae2af2ec8f42de4 [formerly 5fe44b5414759596b97f8140deb38c89750a0a75]
Former-commit-id: 978ad59ea2536ea2f21acefe952e360bf99211a7
darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide