qcacmn: Correct len size of oem data request

qcacld-2.0 to qcacmn propagation.

oem data request len size should be of 4 byte instead of
1 byte.
Add changes to correct len size in wmi unified API.

Change-Id: I9b377420c50ff1160964f94be5eaa0072df0f63d
CRs-Fixed: 1013488
diff --git a/wmi_unified_api.h b/wmi_unified_api.h
index 1bd40a0..55951f4 100644
--- a/wmi_unified_api.h
+++ b/wmi_unified_api.h
@@ -629,7 +629,7 @@
 QDF_STATUS wmi_unified_csa_offload_enable(void *wmi_hdl, uint8_t vdev_id);
 
 QDF_STATUS wmi_unified_start_oem_data_cmd(void *wmi_hdl,
-			  uint8_t data_len,
+			  uint32_t data_len,
 			  uint8_t *data);
 
 QDF_STATUS wmi_unified_dfs_phyerr_filter_offload_en_cmd(void *wmi_hdl,