uboot: install multiple spl images

For some platforms, there are multiple generated spl images.  Extend
BR2_TARGET_UBOOT_SPL_NAME to allow these multiple images to be installed
after uboot build completes.

For example, the NextThingCo C.H.I.P. uses two binaries from uboot,
spl/sunxi-spl.bin and spl/sunxi-spl-with-ecc.bin.

Signed-off-by: Jason Abele <jason@nextthing.co>
[Maxime:
 - Add foreach loop for general case and mkpimage
 - Use firstword for zynq case]
Signe-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>

Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

boot/uboot/Config.in

@@ -313,7 +313,7 @@ config BR2_TARGET_UBOOT_SPL_NAME
 	default "spl/u-boot-spl.bin"
 	depends on BR2_TARGET_UBOOT_SPL
 	help
-	  This is the name of the SPL binary, generated during
+	  A space-separated list of SPL binaries, generated during
 	  u-boot build. For most platform it is spl/u-boot-spl.bin
 	  but not always. It is MLO on OMAP for example.
 

boot/uboot/uboot.mk

@@ -170,7 +170,10 @@ define UBOOT_INSTALL_IMAGES_CMDS
 	$(if $(BR2_TARGET_UBOOT_FORMAT_NAND),
 		cp -dpf $(@D)/$(UBOOT_MAKE_TARGET) $(BINARIES_DIR))
 	$(if $(BR2_TARGET_UBOOT_SPL),
-		cp -dpf $(@D)/$(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME)) $(BINARIES_DIR)/)
+		$(foreach f,$(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME)), \
+			cp -dpf $(@D)/$(f) $(BINARIES_DIR)/
+		)
+	)
 	$(if $(BR2_TARGET_UBOOT_ENVIMAGE),
 		cat $(call qstrip,$(BR2_TARGET_UBOOT_ENVIMAGE_SOURCE)) | \
 			$(HOST_DIR)/usr/bin/mkenvimage -s $(BR2_TARGET_UBOOT_ENVIMAGE_SIZE) \
@@ -198,8 +201,9 @@ endif
 
 ifeq ($(BR2_TARGET_UBOOT_ZYNQ_IMAGE),y)
 define UBOOT_GENERATE_ZYNQ_IMAGE
-	$(HOST_DIR)/usr/bin/python2 $(HOST_DIR)/usr/bin/zynq-boot-bin.py \
-		-u $(@D)/$(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME))     \
+	$(HOST_DIR)/usr/bin/python2 \
+		$(HOST_DIR)/usr/bin/zynq-boot-bin.py \
+		-u $(@D)/$(firstword $(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME)) \
 		-o $(BINARIES_DIR)/BOOT.BIN
 endef
 UBOOT_DEPENDENCIES += host-zynq-boot-bin
@@ -208,8 +212,11 @@ endif
 
 ifeq ($(BR2_TARGET_UBOOT_ALTERA_SOCFPGA_IMAGE_CRC),y)
 define UBOOT_CRC_ALTERA_SOCFPGA_IMAGE
-	$(HOST_DIR)/usr/bin/mkpimage -o $(BINARIES_DIR)/$(notdir $(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME))).crc \
-		$(@D)/$(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME))
+	$(foreach f,$(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME)), \
+		$(HOST_DIR)/usr/bin/mkpimage \
+			-o $(BINARIES_DIR)/$(notdir $(call qstrip,$(f))).crc \
+			$(@D)/$(call qstrip,$(f))
+	)
 endef
 UBOOT_DEPENDENCIES += host-mkpimage
 UBOOT_POST_INSTALL_IMAGES_HOOKS += UBOOT_CRC_ALTERA_SOCFPGA_IMAGE