[U-Boot] axm SPL image too big

[Albert ARIBAUD]

(cc:ing Heiko as the maintainer for axm/taurus)

Hello,

AXM is currently the only board failing 'buildman arm aarch64':

+arm-unknown-linux-gnueabi-ld.bfd: SPL image too big
+make[2]: *** [spl/u-boot-spl] Error 1
+make[1]: *** [spl/u-boot-spl] Error 2
+make: *** [sub-make] Error 2

Apparently SPL is already being built in Thumb instruction set, so no
way to gain anything that way.

What else can we do to get SPL size back under limit?

Amicalement,
-- 
Albert.