thermal/drivers/bcm2835: Use %pC instead of %pCn

The %pC and %pCn printk format specifiers produce the exact same string. In
preparation for removing %pCn, use %pC.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://lore.kernel.org/r/20250311-vsprintf-pcn-v2-1-0af40fc7dee4@bootlin.com


Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>