msm: camera: eeprom: Correct EEPROM Read return

EEPROM Read using QUP I2C returns the number of bytes
read from the EEPROM, While CCI/SPI returns zero value.
Return Error only when if the value is less than zero.

CRs-Fixed: 2617882
External Impact: No
Change-Id: I9a9674366c10de4efce779f75dd36b293838c47b
Signed-off-by: Shankar Ravi <[email protected]>

drivers/cam_sensor_module/cam_eeprom/cam_eeprom_core.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/module.h>
@@ -108,7 +108,7 @@ static int cam_eeprom_read_memory(struct cam_eeprom_ctrl_t *e_ctrl,
 				emap[j].mem.addr_type,
 				emap[j].mem.data_type,
 				emap[j].mem.valid_size);
-			if (rc) {
+			if (rc < 0) {
 				CAM_ERR(CAM_EEPROM, "read failed rc %d",
 					rc);
 				return rc;