staging: vchiq: drop trailing semicolon in macro definition

As reported by checkpatch.pl, macro definitions should not use a trailing
semicolon.

Signed-off-by: Gaston Gonzalez <gascoar@gmail.com>
Link: https://lore.kernel.org/r/20211024212524.370078-6-gascoar@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>