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

This reverts commit 4490c795 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: Ief1921fb7a64095dfde41fc131a0ff30d2db3d37
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>