soc: qcom: dcc_v2: Add read_write dt config support for dcc_v2

Add read_write dt config to support the configure that read an
address's value and then modify the address's value in device tree.

Change-Id: I85c37ed739af8739b87e4dd817dd2e2faf74555f
Signed-off-by: Mao Jinlong <jinlmao@codeaurora.org>