objtool, drm/vmwgfx: Don't ignore vmw_send_msg() for ORC

The following commit:

  0b0d81e3 ("objtool, drm/vmwgfx: Fix "duplicate frame pointer save" warning")

... marked vmw_send_msg() STACK_FRAME_NON_STANDARD because it uses RBP
in a non-standard way which violates frame pointer convention.

That issue only affects the frame pointer unwinder.  Remove the
annotation for ORC.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/eff3102a7eeb77b4420fcb5e9d9cd9dd81d4514a.1743136205.git.jpoimboe@kernel.org