rk3566: bl31 ultra: update version to v2.15

Build from ATF commit:
	2f6f2e6f4 rk356x: ddr: lite suspend also disable clk drivers

update feature:
	2f6f2e6f4 rk356x: ddr: lite suspend also disable clk drivers
	0785f9cdf plat: rk3568: sleep: do overlay_sram_restore after cache enable
	0b69391a7 plat: rk3588: enable mmu/cache before dmc_restore

Change-Id: Iccd27f3b421c2a7f40725791973fd6bc7a66b68d
Signed-off-by: Weixin Zhou <zwx@rock-chips.com>

RKTRUST/RK3566TRUST_ULTRA.ini

@@ -5,7 +5,7 @@ MINOR=0
 SEC=0
 [BL31_OPTION]
 SEC=1
-PATH=bin/rk35/rk3568_bl31_ultra_v2.14.elf
+PATH=bin/rk35/rk3568_bl31_ultra_v2.15.elf
 ADDR=0x00040000
 [BL32_OPTION]
 SEC=1

doc/release/RK3566_CN.md

@@ -1,5 +1,18 @@
 # RK3566 Release Note
 
+## rk3568_bl31_ultra_v2.15.elf
+
+| 时间       | 文件                        | 编译 commit | 重要程度 |
+| ---------- | --------------------------- | ----------- | -------- |
+| 2023-10-28 | rk3568_bl31_ultra_v2.15.elf | 2f6f2e6f4   | 重要     |
+
+### New
+
+1. 优化唤醒速度。
+2. 修复lite休眠, vcc_ddr 概率功耗高。
+
+------
+
 ## rk3568_bl31_ultra_v2.14.elf
 
 | 时间       | 文件                        | 编译 commit | 重要程度 |

doc/release/RK3566_EN.md

@@ -1,5 +1,18 @@
 # RK3566 Release Note
 
+## rk3568_bl31_ultra_v2.15.elf
+
+| Date       | File                        | Build commit | Severity  |
+| ---------- | --------------------------- | ------------ | --------- |
+| 2023-10-28 | rk3568_bl31_ultra_v2.15.elf | 2f6f2e6f4    | important |
+
+### New
+
+1. Optimize wakeup speed.
+2. Fix lite mode sleep, vcc_ddr probability high power consumption.
+
+------
+
 ## rk3568_bl31_ultra_v2.14.elf
 
 | Date       | File                        | Build commit | Severity  |