bus: mhi: host: Rename "struct mhi_tre" to "struct mhi_ring_element"

[ Upstream commit 84f5f31f ]

Structure "struct mhi_tre" is representing a generic MHI ring element and
not specifically a Transfer Ring Element (TRE). Fix the naming.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20220301160308.107452-9-manivannan.sadhasivam@linaro.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: eff9704f ("bus: mhi: host: Add alignment check for event ring read pointer")
Signed-off-by: Sasha Levin <sashal@kernel.org>