ASoC: tlv320aic32x4: pll: Remove impossible condition in clk_aic32x4_pll_determine_rate()

ASoC: tlv320aic32x4: pll: Remove impossible condition in clk_aic32x4_pll_determine_rate()

Smatch warns:

sound/soc/codecs/tlv320aic32x4-clk.c:219 clk_aic32x4_pll_determine_rate() warn: unsigned 'rate' is never less than zero.

Cc: Maxime Ripard <maxime@cerno.tech>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306101217.08CRVGcK-lkp@intel.com/
Fixes: 25d43ec352ea ("ASoC: tlv320aic32x4: pll: Switch to determine_rate")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20230613011201.1166753-1-sboyd@kernel.org
Reviewed-by: Maxime Ripard <mripard@kernel.org>