Return proper error code in case query for fixed factor
parameter fails. This also fixes build warning for set
but not used variable 'ret'.
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Fixes: 3fde0e16 ("drivers: clk: Add ZynqMP clock driver")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>