panfrost: lower maxVertexInputStride to match vulkan runtime
Since we now use the common vulkan runtime to handle pipeline state and this sets a limit for this at MESA_VK_MAX_VERTEX_BINDING_STRIDE we should do the same, or else we can run into an assert-fail in the runtime code.
Basically the same as !29454 (merged), but for Panfrost.
Fixes: 214761bd ("panvk: Fully transition to vk_vertex_binding_state")