k2hk: add support for k2hk SOC and EVM

k2hk EVM is based on Texas Instruments Keystone2 Hawking/Kepler
SoC. Keystone2 SoC has ARM v7 Cortex-A15 MPCore processor. Please
refer the ti/k2hk_evm/README for details on the board, build and other
information.

This patch add support for keystone architecture and k2hk evm.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
Signed-off-by: Sandeep Nair <sandeep_n@ti.com>
diff --git a/Makefile b/Makefile
index b2937e9..464d731 100644
--- a/Makefile
+++ b/Makefile
@@ -870,6 +870,16 @@
 u-boot.spr: spl/u-boot-spl.img u-boot.img FORCE
 	$(call if_changed,pad_cat)
 
+MKIMAGEFLAGS_u-boot-spl.gph = -A $(ARCH) -T gpimage -C none \
+	-a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) -n SPL
+spl/u-boot-spl.gph: spl/u-boot-spl.bin FORCE
+	$(call if_changed,mkimage)
+
+OBJCOPYFLAGS_u-boot-spi.gph = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO) \
+			  --gap-fill=0
+u-boot-spi.gph: spl/u-boot-spl.gph u-boot.img FORCE
+	$(call if_changed,pad_cat)
+
 ifneq ($(CONFIG_TEGRA),)
 OBJCOPYFLAGS_u-boot-nodtb-tegra.bin = -O binary --pad-to=$(CONFIG_SYS_TEXT_BASE)
 u-boot-nodtb-tegra.bin: spl/u-boot-spl u-boot.bin FORCE