intel: Rename gen field in gen_device_info struct to ver

Commands used to do the changes:
export SEARCH_PATH="src/intel src/gallium/drivers/iris src/mesa/drivers/dri/i965"
grep -E "info\)*(.|->)gen" -rIl $SEARCH_PATH | xargs sed -ie "s/info\()*\)\(\.\|->\)gen/info\1\2ver/g"

Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9936>

src/intel/compiler/brw_fs.h

@@ -455,7 +455,7 @@ static inline unsigned
 sample_mask_flag_subreg(const fs_visitor *shader)
 {
    assert(shader->stage == MESA_SHADER_FRAGMENT);
-   return shader->devinfo->gen >= 7 ? 2 : 1;
+   return shader->devinfo->ver >= 7 ? 2 : 1;
 }
 
 /**