After patch https://github.com/llvm/llvm-project/pull/88805
`I` Ext will be added automatically when we running the command like
`./build/bin/llc -mtriple=riscv32 -mattr=+e -target-abi ilp32e
-verify-machineinstrs llvm/test/CodeGen/RISCV/zcmp-additional-stack.ll`
it will generate
```
.text
.attribute 4, 16
.attribute 5, "rv32i2p1_e2pe"
.file "zcmp-additional-stack.ll"
.globl func # -- Begin function func
.p2align 1
.type func,@function
```
This patch reset the I ext in FeatureBit when `+e` has been specify
844355a8cb