[llvm] [X86AsmParser] IntelExpression: End of Statement should check for valid end state (PR #95677)

[Shengchen Kan via llvm-commits]

KanRobert wrote:

AsmParser is shared by assembler and fronr-end. Could you add a `.s` test to show what you fixed?

https://github.com/llvm/llvm-project/pull/95677