dyndbg: Use *no_printk() helpers

When printk-indexing is enabled, each printk() or dev_printk()
invocation emits a pi_entry structure.  This is even true when the call
is protected by an always-false check: while the actual code to print
the message is optimized out by the compiler, the pi_entry structure is
still emitted.

Fix this by replacing "if (0) *printk(...)" constructs by calls to the
corresponding *no_printk() helpers.

Note that this has minimal impact, as most (all?) callers of
dynamic_{pr,dev}_debug() are protected by checks for DYNAMIC_DEBUG
anyway.  Still, using the helpers serves as a good example to follow.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Chris Down <chris@chrisdown.name>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/32e18ceb528b99d9147be9c1af578a1965e2bad9.1709127473.git.geert+renesas@glider.be


Signed-off-by: Petr Mladek <pmladek@suse.com>