rk312x: loader: Add rk atags support.

from commit: 6da10d add rk atags bootdev.

Change-Id: Iec09b6d50fa6735f69ab9590fada97548721442e
Signed-off-by: Fen Chen <chenfen@rock-chips.com>

RKBOOT/PX3SEMINIALL.ini

@@ -9,7 +9,7 @@ Path1=bin/rk31/px3se_ddr_300MHz_v2.09_uart1.bin
 Sleep=1
 [CODE472_OPTION]
 NUM=1
-Path1=bin/rk31/rk3128_usbplug_v2.54.bin
+Path1=bin/rk31/rk3128_usbplug_v2.56.bin
 [LOADER_OPTION]
 NUM=2
 LOADER1=FlashData

RKBOOT/RK3126MINIALL.ini

@@ -2,7 +2,7 @@
 NAME=RK312A
 [VERSION]
 MAJOR=2
-MINOR=54
+MINOR=56
 [CODE471_OPTION]
 NUM=1
 Path1=bin/rk31/rk3126_ddr_300MHz_v2.09.bin
@@ -15,6 +15,6 @@ NUM=2
 LOADER1=FlashData
 LOADER2=FlashBoot
 FlashData=bin/rk31/rk3126_ddr_300MHz_v2.09.bin
-FlashBoot=bin/rk31/rk312x_miniloader_v2.54.bin
+FlashBoot=bin/rk31/rk312x_miniloader_v2.56.bin
 [OUTPUT]
-PATH=rk3126_loader_v2.09.254.bin
+PATH=rk3126_loader_v2.09.256.bin

RKBOOT/RK3128.ini

@@ -9,7 +9,7 @@ Path1=bin/rk31/rk3128_ddr_300MHz_v2.07.bin
 Sleep=1
 [CODE472_OPTION]
 NUM=1
-Path1=bin/rk31/rk3128_usbplug_v2.54.bin
+Path1=bin/rk31/rk3128_usbplug_v2.56.bin
 [LOADER_OPTION]
 NUM=2
 LOADER1=FlashData

RKBOOT/RK3128MINIALL.ini

@@ -2,19 +2,19 @@
 NAME=RK312A
 [VERSION]
 MAJOR=2
-MINOR=54
+MINOR=56
 [CODE471_OPTION]
 NUM=1
 Path1=bin/rk31/rk3128_ddr_300MHz_v2.08.bin
 Sleep=1
 [CODE472_OPTION]
 NUM=1
-Path1=bin/rk31/rk3128_usbplug_v2.54.bin
+Path1=bin/rk31/rk3128_usbplug_v2.56.bin
 [LOADER_OPTION]
 NUM=2
 LOADER1=FlashData
 LOADER2=FlashBoot
 FlashData=bin/rk31/rk3128_ddr_300MHz_v2.08.bin
-FlashBoot=bin/rk31/rk312x_miniloader_v2.54.bin
+FlashBoot=bin/rk31/rk312x_miniloader_v2.56.bin
 [OUTPUT]
-PATH=rk3128_loader_v2.08.254.bin
+PATH=rk3128_loader_v2.08.256.bin