msm: camera: Fix memory leak in cam_res_mgr_probe()

Since we have multiple CCIs with qcom,cam-res-mgr defined, the global
cam_res pointer gets overwritten each time a CCI probes, causing memory
to be leaked. Since it appears that the single global cam_res pointer is
intentional, let's just skip superfluous cam_res allocations to fix the
leak.

Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: LibXZR <xzr467706992@163.com>
Signed-off-by: UtsavBalar1231 <utsavbalar1231@gmail.com>

techpack/camera/drivers/cam_sensor_module/cam_res_mgr/cam_res_mgr.c

@@ -665,6 +665,9 @@ static int cam_res_mgr_probe(struct platform_device *pdev)
 {
 	int rc = 0;
 
+	if (cam_res)
+		return 0;
+
 	cam_res = kzalloc(sizeof(*cam_res), GFP_KERNEL);
 	if (!cam_res)
 		return -ENOMEM;