panfrost: Fix gnu-empty-initializer error.
../src/gallium/drivers/panfrost/pan_cmdstream.c:1553:54: error: use of GNU empty initializer extension [-Werror,-Wgnu-empty-initializer]
union mali_attr varyings[PIPE_MAX_ATTRIBS] = { };
^
Fixes: 836686daf36c ("panfrost: Move panfrost_emit_varying_descriptor() to pan_cmdstream.c")
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
cc: @bbrezillon