expr: allow any expression to contain relational operators
expr: allow any expression to contain relational operators

There is absolutely no reason not to allow relational operators in
arbitrary contexts. and doing so can be quite useful.

Signed-off-by: H. Peter Anvin <8a453bad9912ffe59bc0f0b8abe03df9be19379e@zytor.com>

techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm