lima: ppir: fix texture lowering
- Don't delete root ld_tex nodes. Since we don't clone ld_tex nodes into each block anymore, ld_tex may have successors in another block
- Update ld_tex successors in all blocks when we insert a mov
Fixes: c8554f84 ("lima/ppir: don't clone texture loads") Signed-off-by: Vasily Khoruzhick anarsoul@gmail.com