Before this commit, PseudoLA_TLS_LE for normal/medium code model expand
normally to:
```
lu12i.w $rd, %le_hi20(sym)
ori $rd, $rd, %le_lo12(sym)
```
This commit changes the result to:
```
lu12i.w $rd, %le_hi20_r(sym)
add.w/d $rd, $rd, $tp, %le_add_r(sym)
addi.w/d $rd, $rd, %le_lo12_r(sym)
```
This aims to be optimized by linker relaxation in the future.
This commit makes no change to PseudoLA_TLS_LE in large code model.
b53866fec8