ARM: keystone2: Rename u-boot-nand.gph to MLO

NAND boot mode, ROM expects an image with a gp header in the
beginning and an 8bytes filled with zeros at the end. The same is
true for SD boot on K2G platforms but the file name should be MLO.

Renaming u-boot-nand.gph to MLO, so that same image can be used for
NAND and SD boots. And also not including all the u-boot only images
under CONFIG_SPL_BUILD.

Reported-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>

arch/arm/mach-keystone/config.mk

@@ -15,8 +15,10 @@ OBJCOPYFLAGS_u-boot-spi.gph = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO)
 u-boot-spi.gph: spl/u-boot-spl.gph u-boot.img FORCE
 	$(call if_changed,pad_cat)
 
-MKIMAGEFLAGS_u-boot-nand.gph = -A $(ARCH) -T gpimage -C none \
+ifndef CONFIG_SPL_BUILD
+MKIMAGEFLAGS_MLO = -A $(ARCH) -T gpimage -C none \
 	-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) -n U-Boot
-u-boot-nand.gph: u-boot.bin FORCE
+MLO: u-boot.bin FORCE
 	$(call if_changed,mkimage)
 	@dd if=/dev/zero bs=8 count=1 2>/dev/null >> $@
+endif

board/ti/ks2_evm/README

@@ -61,7 +61,7 @@ Supported image formats:
  - u-boot.bin: for loading and running u-boot.bin through Texas instruments
                code composure studio (CCS)
  - u-boot-spi.gph: gpimage for programming SPI NOR flash for SPI NOR boot
- - u-boot-nand.gph: gpimage for programming AEMIF NAND flash for NAND boot
+ - MLO: gpimage for programming AEMIF NAND flash for NAND boot
 
 Build instructions:
 ===================
@@ -76,9 +76,9 @@ To build u-boot-spi.gph
   >make k2hk_evm_defconfig
   >make u-boot-spi.gph
 
-To build u-boot-nand.gph
+To build MLO
   >make k2hk_evm_defconfig
-  >make u-boot-nand.gph
+  >make MLO
 
 Load and Run U-Boot on keystone EVMs using CCS
 =========================================
@@ -157,12 +157,12 @@ instructions:
 1. Start CCS and run U-boot as described above.
 2. Suspend Target. Select Run -> Suspend from top level menu
    CortexA15_1 (Free Running)"
-3. Load u-boot-nand.gph binary from build folder on to DDR address 0x87000000
+3. Load MLO binary from build folder on to DDR address 0x87000000
    through CCS as described in step 2 of "Load and Run U-Boot on K2HK EVM
    using CCS", but using address 0x87000000.
 4. Free Run the target as described earlier (step 4) to get u-boot prompt
 5. At the U-Boot console type following to setup u-boot environment variables.
-   setenv filesize <size in hex of u-boot-nand.gph rounded to hex 0x10000>
+   setenv filesize <size in hex of MLO rounded to hex 0x10000>
    run burn_uboot_nand
    Once u-boot prompt is available, Power OFF the EVM. Set the SW1 dip switch
    to "ARM NAND Boot mode" as per instruction at