ACPI: use proper DYNAMIC_DEBUG_BRANCH macro

ACPI: use proper DYNAMIC_DEBUG_BRANCH macro

dynamic debug may be implemented via static keys, but ACPI is missing
out on that runtime benefit since it open-codes one possible definition
of DYNAMIC_DEBUG_BRANCH.

Link: http://lkml.kernel.org/r/20190212214150.4807-13-linux@rasmusvillemoes.dk
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Jason Baron <jbaron@akamai.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>