media: synopsys: csi2rx: only check errors from devm_clk_bulk_get_all()

media: synopsys: csi2rx: only check errors from devm_clk_bulk_get_all()

devm_clk_bulk_get_all() returns all clocks described in the DT, which are
already validated by the binding. Do not need enforce an expected clock
count.

Only check for error returns (< 0) to support more SoCs.

Reviewed-by: Michael Riesch <michael.riesch@collabora.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>