UPSTREAM: arm64: sanity checks: add missing newline to print

A missing newline in the WARN_TAINT_ONCE string results in ugly and
somewhat difficult to read output in the case of a sanity check failure,
as the next print does not appear on a new line:

  Unsupported CPU feature variation.Modules linked in:

This patch adds the missing newline, fixing the output formatting.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

Bug: 31432001
Change-Id: I99e09e09833594333bbd95eff1c19db6356357ae
(cherry picked from commit efdf4211d5b103535ae22972acadf57c9fc38b30)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>