rockchip: rk3568: Read cpuid from otp

The cpuid on RK3568 is located at 0xa instead of 0x7 as all other SoCs.
Add and use a CFG_CPUID_OFFSET to define this offset.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/include/configs/rockchip-common.h b/include/configs/rockchip-common.h
index ff8123d..b7c5c66 100644
--- a/include/configs/rockchip-common.h
+++ b/include/configs/rockchip-common.h
@@ -7,6 +7,10 @@
 #define _ROCKCHIP_COMMON_H_
 #include <linux/sizes.h>
 
+#ifndef CFG_CPUID_OFFSET
+#define CFG_CPUID_OFFSET	0x7
+#endif
+
 /* ((CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR - 64) * 512) */
 
 #ifndef CONFIG_SPL_BUILD