toolchain.eclass: ensure thumb mode for armv6m #25687
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Currently the eclass ensures thumb mode compilation for libgcc for
armv7m targets
with
But libgcc should also be compiled in thumb mode for the armv6m target.
Add the dash as is done for the armv7 case so that
--with-mode=thumb
option is added for armv6m.
Signed-off-by: Marek Behún kabel@kernel.org