power: avs: fix uninitialized error return on failed cpr_read_fuse_uV() call

Currently when the call cpr_read_fuse_uV returns an error the value in the
uninitialized variable ret is returned. Fix this by instread returning the
error value in the variable uV.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: bf6910ab ("power: avs: Add support for CPR (Core Power Reduction)")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/power/avs/qcom-cpr.c

@@ -922,7 +922,7 @@ static int cpr_fuse_corner_init(struct cpr_drv *drv)
 		uV = cpr_read_fuse_uV(desc, fdata, fuses->init_voltage,
 				      step_volt, drv);
 		if (uV < 0)
-			return ret;
+			return uV;
 
 		fuse->min_uV = fdata->min_uV;
 		fuse->max_uV = fdata->max_uV;