pbl: use "wait" command instead of "flush" command

PBL flush command is restricted to CCSR memory space. So use WAIT
PBI command to provide enough time for data to get flush in
target memory.

Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com>
[York Sun: rewrap commit message]
Reviewed-by: York Sun <york.sun@nxp.com>

board/freescale/t208xqds/t208x_pbi.cfg

@@ -37,5 +37,4 @@
 09000014 ff000000
 09000018 81000000
 #Flush PBL data
-09138000 00000000
-091380c0 00000000
+091380c0 00100000

board/freescale/t208xrdb/t2080_pbi.cfg

@@ -37,5 +37,4 @@
 09000014 ff000000
 09000018 81000000
 #Flush PBL data
-09138000 00000000
-091380c0 00000000
+091380c0 00100000

board/freescale/t4qds/t4_pbi.cfg

@@ -18,5 +18,4 @@
 09000014 ff000000
 09000018 81000000
 #Flush PBL data
-09138000 00000000
-091380c0 00000000
+091380c0 00100000

board/freescale/t4rdb/t4_pbi.cfg

@@ -24,5 +24,4 @@
 09000014 ff000000
 09000018 81000000
 #Flush PBL data
-09138000 00000000
-091380c0 00000000
+091380c0 00100000

tools/pblimage.c

@@ -297,7 +297,7 @@ int pblimage_check_params(struct image_tool_params *params)
 		pbi_crc_cmd1 = 0x13;
 		pbi_crc_cmd2 = 0x80;
 		pbl_cmd_initaddr = 0x82000000;
-		pbl_end_cmd[0] = 0x09138000;
+		pbl_end_cmd[0] = 0x091380c0;
 		pbl_end_cmd[1] = 0x00000000;
 		pbl_end_cmd[2] = 0x091380c0;
 		pbl_end_cmd[3] = 0x00000000;