binman: Add support for PowerPC mpc85xx 'bootpg + resetvec' entry

This entry contains the PowerPC mpc85xx boot page and resetvec
sections.

Signed-off-by: Jagdish Gediya <jagdish.gediya@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/tools/binman/README.entries b/tools/binman/README.entries
index c6e7b22..6c78fb3 100644
--- a/tools/binman/README.entries
+++ b/tools/binman/README.entries
@@ -221,6 +221,18 @@
 
 
 
+Entry: powerpc-mpc85xx-bootpg-resetvec: PowerPC mpc85xx bootpg + resetvec code for U-Boot
+-----------------------------------------------------------------------------------------
+
+Properties / Entry arguments:
+    - filename: Filename of u-boot-br.bin (default 'u-boot-br.bin')
+
+This enrty is valid for PowerPC mpc85xx cpus. This entry holds
+'bootpg + resetvec' code for PowerPC mpc85xx CPUs which needs to be
+placed at offset 'RESET_VECTOR_ADDRESS - 0xffc'.
+
+
+
 Entry: section: Entry that contains other entries
 -------------------------------------------------
 
@@ -543,7 +555,7 @@
     - kernelkey: Name of the kernel key to use (inside keydir)
     - preamble-flags: Value of the vboot preamble flags (typically 0)
 
-Chromium OS  signs the read-write firmware and kernel, writing the signature
+Chromium OS signs the read-write firmware and kernel, writing the signature
 in this block. This allows U-Boot to verify that the next firmware stage
 and kernel are genuine.