ARM: uniphier: switch to raw U-Boot image

Now everything is done to load a raw U-Boot proper image instead of
an mkimage-processed one (as far as I tested on NAND, eMMC, NOR).

The SPL already knows the load address of the U-Boot proper without
parsing its uImage header because the load address is defined by
CONFIG_SYS_TEXT_BASE, assuming that the two images are generated from
the same build.

My main motivation of this switch is to use u-boot-with-spl.bin, a
concatenation of u-boot-spl.bin and u-boot.bin.  (I wish there were
a concatenation of u-boot-spl.bin and u-boot.img...)  Anyway, this
commit would be useful for one-shot image burn.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/doc/README.uniphier b/doc/README.uniphier
index 47863a4..49045a0 100644
--- a/doc/README.uniphier
+++ b/doc/README.uniphier
@@ -75,12 +75,17 @@
 Burn U-Boot images to NAND
 --------------------------
 
-Write two files to the NAND device as follows:
+Write the following to the NAND device:
+
  - spl/u-boot-spl.bin at the offset address 0x00000000
- - u-boot.img         at the offset address 0x00010000
+ - u-boot.bin         at the offset address 0x00010000
+
+or
+
+ - u-boot-with-spl.bin at the offset address 0x00000000
 
 If a TFTP server is available, the images can be easily updated.
-Just copy the u-boot-spl.bin and u-boot.img to the TFTP public directory,
+Just copy the u-boot-spl.bin and u-boot.bin to the TFTP public directory,
 and then run the following command at the U-Boot command line:
 
   => run nandupdate
@@ -89,12 +94,17 @@
 Burn U-Boot images to eMMC
 --------------------------
 
-Write two files to the Boot partition 1 of the eMMC device as follows:
+Write the following to the Boot partition 1 of the eMMC device:
+
  - spl/u-boot-spl.bin at the offset address 0x00000000
- - u-boot.img         at the offset address 0x00010000
+ - u-boot.bin         at the offset address 0x00010000
+
+or
+
+ - u-boot-with-spl.bin at the offset address 0x00000000
 
 If a TFTP server is available, the images can be easily updated.
-Just copy the u-boot-spl.bin and u-boot.img to the TFTP public directory,
+Just copy the u-boot-spl.bin and u-boot.bin to the TFTP public directory,
 and then run the following command at the U-Boot command line:
 
   => run emmcupdate