Revert "usb: typec: ucsi: fix Clang -Wsign-conversion warning"

This reverts commit b63f23fb which is
commit f4239ace upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I24f111caa0ab721abfae8d993c6662ec25b85b55
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>