TEST_ONLY: ARM: dts: add xin32k for some devices.

for example:
   clock                        enable_cnt  prepare_cnt  rate        accuracy
---------------------------------------------------------------------------------
 xin32k                         1           1            32768      0
    sclk_hdmi_cec               0           0            32768      0
    sclk_otg_adp                0           0            32768      0
    sclk_tsadc                  1           1            8192       0

We can revert it if RTC-32kCLK-OUT be provided.
for example: PMU: rk808: rtc

/* optional override of the clockname */
of_property_read_string(node, "clock-output-names", &init.name);
Then The DTS have the rk808-rtc configure for clock-output-names.

Signed-off-by: Caesar Wang <caesar.wang@rock-chips.com>