phy: rockchip: remove unused hw_to_inno function

phy: rockchip: remove unused hw_to_inno function

clang with W=1 reports
drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c:284:36: error:
  unused function 'hw_to_inno' [-Werror,-Wunused-function]
static inline struct inno_dsidphy *hw_to_inno(struct clk_hw *hw)
                                   ^
This function is not used so remove it.

Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20230324132649.2649166-1-trix@redhat.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>