clk: qcom: gcc-sdm845: remove XO dummy clock

BI_TCXO clock is defined as dummy clock. The clock is
managed by clk-rpmh driver. Remove it.

Change-Id: I790f4dc2393e560515d5d6e60456fdc2cd59daf1
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>