i3c: i3c-master-qcom-geni: Support for 3.4 Mhz,400 Khz

The change involes support for 3.4 Mhz and modified clk values for 400 Khz
to support NFC enumeration. Also changed open drain frequency to be used
from i2c clk freq passed from DTSI.

Change-Id: Ibba2416dab09c958b31779857aad5fe8dd753773
Signed-off-by: Subramanian Ananthanarayanan <skananth@codeaurora.org>