clk: qcom: rpmh: remove duplicate IPA clock reference

One of the ones that were recently added was already there:

drivers/clk/qcom/clk-rpmh.c:578:35: error: initialized field overwritten [-Werror=override-init]
  578 |         [RPMH_IPA_CLK]          = &clk_rpmh_ipa.hw,

Fixes: aa055bf1 ("clk: qcom: rpmh: define IPA clocks where required")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230117170217.2462320-1-arnd@kernel.org