drivers: soc: qcom: Check if readq_relaxed macro is defined

Two drivers define their own readq_relaxed macro. This is
redefined by the RTB to allow for register logging, so these
drivers must ensure it is not already defined before
overwriting it.

Change-Id: I81dcb29fdbe55b933ff74c24d879ac9361619a8c
Signed-off-by: Melody Olvera <molvera@codeaurora.org>