Preserve LR and CPSR in DebugTX
Timothy E Baldwin authored
This ensures that the debug macros may be freeley placed without
concern for if LR and CPSR contain important values, and avoid the
of code only working because the debug code changes the flags with
the effect of a bug appearing when debugging is enabled.

Version 6.49. Tagged as 'Kernel-6_49'
59d9f948