[source] at91bootstrap: Add BUILD_SUBTARGET variable

[LEDE Commits]

hauke pushed a commit to source.git, branch master:
https://git.lede-project.org/cc443e894a1b01093f5abba0c2884eb64c2f1778

commit cc443e894a1b01093f5abba0c2884eb64c2f1778
Author: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun at microchip.com>
AuthorDate: Wed Oct 4 16:14:39 2017 -0700

    at91bootstrap: Add BUILD_SUBTARGET variable
    
    Added sama5 to BUILD_SUBTARGET variable.This will populate at91bootstrap
    menu options in bootloader menu only when SAMA5 devices are selected as
    SUBTARGET and to avoid showing up this menu when legacy device is
    selected as SUBTARGET and fixed typo mistake: sama5d3 -> sama5d2.
    
    Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun at microchip.com>
---
 package/boot/at91bootstrap/Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/package/boot/at91bootstrap/Makefile b/package/boot/at91bootstrap/Makefile
index ae60fad..4571fed 100644
--- a/package/boot/at91bootstrap/Makefile
+++ b/package/boot/at91bootstrap/Makefile
@@ -24,13 +24,14 @@ include $(INCLUDE_DIR)/package.mk
 
 define AT91Bootstrap/Default
   BUILD_TARGET:=at91
+  BUILD_SUBTARGET:=sama5
   AT91BOOTSTRAP_IMAGE:=at91bootstrap.bin
 endef
 
 define at91bootstrap/sama5d2_xplaineddf_uboot
-  TITLE:=AT91Bootstrap for the SAMA5D3 Xplained board (SPI Flash)
+  TITLE:=AT91Bootstrap for the SAMA5D2 Xplained board (SPI Flash)
   BUILD_SUBTARGET:=sama5
-  BUILD_DEVICES:=at91-sama5d3_xplained
+  BUILD_DEVICES:=at91-sama5d2_xplained
 endef
 
 define at91bootstrap/sama5d2_xplaineddf_qspi_uboot