clk: qcom: clk-alpha-pll: fix lucid 5lpe pll enabled check

clk: qcom: clk-alpha-pll: fix lucid 5lpe pll enabled check

The lucid 5lpe PLL enable check only checks for an impossible negative
return value and does not actually return as intended in case the PLL is
already enabled (e.g. has been left enabled by boot firmware).

Fixes: f4c7e27aa4b6 ("clk: qcom: clk-alpha-pll: Add support for Lucid 5LPE PLL")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20241022080521.359-3-johan+linaro@kernel.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>