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>

include/linux/acpi.h

@@ -987,7 +987,7 @@ void __acpi_handle_debug(struct _ddebug *descriptor, acpi_handle handle, const c
 #define acpi_handle_debug(handle, fmt, ...)				\
 do {									\
 	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);			\
-	if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))		\
+	if (DYNAMIC_DEBUG_BRANCH(descriptor))				\
 		__acpi_handle_debug(&descriptor, handle, pr_fmt(fmt),	\
 				##__VA_ARGS__);				\
 } while (0)