tools/imximage: use 0x prefix in HAB Blocks line

The u-boot-ivt.img.log file contains 0x prefixes in the HAB Blocks line,
while the SPL.log does not. For consistency, and to make it easier to
extract and put into a .csf file for use with NXP's code signing tool,
add 0x prefixes here.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Tested-by: Breno Lima <breno.lima@nxp.com>
diff --git a/doc/README.mxc_hab b/doc/README.mxc_hab
index 75390a5..a40ebf3 100644
--- a/doc/README.mxc_hab
+++ b/doc/README.mxc_hab
@@ -33,12 +33,12 @@
 Data Size:    327680 Bytes = 320.00 kB = 0.31 MB
 Load Address: 177ff420
 Entry Point:  17800000
-HAB Blocks:   177ff400 00000000 0004dc00
-	      ^^^^^^^^ ^^^^^^^^ ^^^^^^^^
-		|	|	   |
-		|	|	   -------- (1)
-		|	|
-		|	------------------- (2)
+HAB Blocks:   0x177ff400 0x00000000 0x0004dc00
+	      ^^^^^^^^^^ ^^^^^^^^^^ ^^^^^^^^^^
+		|	   |	      |
+		|	   |	      ----- (1)
+		|	   |
+		|	   ---------------- (2)
 		|
 		--------------------------- (3)
 
@@ -78,7 +78,7 @@
  Data Size:    61440 Bytes = 60.00 kB = 0.06 MB
  Load Address: 00907420
  Entry Point:  00908000
- HAB Blocks:   00907400 00000000 0000cc00
+ HAB Blocks:   0x00907400 0x00000000 0x0000cc00
 
 Example Output of the u-boot-ivt.img (firmware_ivt) creation:
  Image Name:   U-Boot 2016.11-rc1-31589-g2a4411