ARM: 6797/1: hw_breakpoint: Fix newlines in WARNings

These warnings are missing newlines and spaces causing confusing
looking output when they trigger.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>