intel/brw: lower math op regions for Xe2+

This helps fix:
  - dEQP-VK.spirv_assembly.instruction.graphics.float16.arithmetic_3.tan_frag
  - dEQP-VK.spirv_assembly.instruction.graphics.float16.arithmetic_2.tan_frag

Signed-off-by: Rohan Garg <rohan.garg@intel.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31218>

src/intel/compiler/brw_fs_lower_regioning.cpp

@@ -310,7 +310,7 @@ namespace {
          return true;
       }
 
-      if (is_send(inst) || inst->is_math() || inst->is_control_source(i) ||
+      if (is_send(inst) || inst->is_control_source(i) ||
           inst->opcode == BRW_OPCODE_DPAS) {
          return false;
       }
@@ -335,7 +335,7 @@ namespace {
    has_invalid_dst_region(const intel_device_info *devinfo,
                           const fs_inst *inst)
    {
-      if (is_send(inst) || inst->is_math()) {
+      if (is_send(inst)) {
          return false;
       } else {
          const brw_reg_type exec_type = get_exec_type(inst);