intel/compiler: Lower flrp32 on Gen11+

The LRP instruction is no more.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/intel/compiler/brw_fs_builder.h

@@ -540,7 +540,7 @@ namespace brw {
       LRP(const dst_reg &dst, const src_reg &x, const src_reg &y,
           const src_reg &a) const
       {
-         if (shader->devinfo->gen >= 6) {
+         if (shader->devinfo->gen >= 6 && shader->devinfo->gen <= 10) {
             /* The LRP instruction actually does op1 * op0 + op2 * (1 - op0), so
              * we need to reorder the operands.
              */