rockchip: rk8xx: remove unused header includes

Remove header file includes that have been left over after the
conversion to livetree-support.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

drivers/power/pmic/rk8xx.c

@@ -8,8 +8,6 @@
 #include <common.h>
 #include <dm.h>
 #include <errno.h>
-#include <fdtdec.h>
-#include <libfdt.h>
 #include <power/rk8xx_pmic.h>
 #include <power/pmic.h>