ks_bridge: Rename ks_hsic_bridge back to ks_bridge

This permits backwards compatibility with userspace older than
https://www.codeaurora.org/cgit/quic/la/kernel/msm/commit/drivers/usb/misc/ks_bridge.c?h=jb_2.5&id=54aeb828d25f916d23a593162ceb8bd5568da8d2

Will almost surely fail with newer userspaces.