Having dashes as a separator in the DTB name is a quite common practice.

However, the current code to generate objects from DTBs assumes the
separator is an underscore, leading to a compilation error when building a
device tree with dashes.

Replace all the dashes in the DTB name to generate the symbols name, which
should solve this issue.

Signed-off-by: Maxime Ripard <maxime.rip...@free-electrons.com>
---
 scripts/Makefile.lib | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index ad1d9b5d7dd2..df1b5a7b4150 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -275,11 +275,11 @@ cmd_dt_S_dtb=                                             
\
 (                                                      \
        echo '.section .dtb.init.rodata,"a"';           \
        echo '.balign 16';                              \
-       echo '.global __dtb_$(*F)_begin';               \
-       echo '__dtb_$(*F)_begin:';                      \
+       echo '.global __dtb_$(subst -,_,$(*F))_begin';  \
+       echo '__dtb_$(subst -,_,$(*F))_begin:';         \
        echo '.incbin "$<" ';                           \
-       echo '__dtb_$(*F)_end:';                        \
-       echo '.global __dtb_$(*F)_end';                 \
+       echo '__dtb_$(subst -,_,$(*F))_end:';           \
+       echo '.global __dtb_$(subst -,_,$(*F))_end';    \
        echo '.balign 16';                              \
 ) > $@
 
-- 
2.8.2

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