clk: qcom: usb: add 19.2MHz frequency with utmi clock table

Add 19.2MHz as frequency with usb30_mock_utmi_clk_src as USB
host mode needs this clock to run at 19.2 MHz for its functionality.

Change-Id: I6f23d0d8b27738c8c762b985ededbc74d3eae244
Signed-off-by: Mayank Rana <mrana@codeaurora.org>